1#!/usr/bin/env perl 2# SPDX-License-Identifier: GPL-2.0 3# 4# (c) 2001, Dave Jones. (the file handling bit) 5# (c) 2005, Joel Schopp <jschopp@austin.ibm.com> (the ugly bit) 6# (c) 2007,2008, Andy Whitcroft <apw@uk.ibm.com> (new conditions, test suite) 7# (c) 2008-2010 Andy Whitcroft <apw@canonical.com> 8# (c) 2010-2018 Joe Perches <joe@perches.com> 9 10use strict; 11use warnings; 12use POSIX; 13use File::Basename; 14use Cwd 'abs_path'; 15use Term::ANSIColor qw(:constants); 16use Encode qw(decode encode); 17 18my $P = $0; 19my $D = dirname(abs_path($P)); 20 21my $V = '0.32'; 22 23use Getopt::Long qw(:config no_auto_abbrev); 24 25my $quiet = 0; 26my $tree = 1; 27my $chk_signoff = 1; 28my $chk_patch = 1; 29my $tst_only; 30my $emacs = 0; 31my $terse = 0; 32my $showfile = 0; 33my $file = 0; 34my $git = 0; 35my %git_commits = (); 36my $check = 0; 37my $check_orig = 0; 38my $summary = 1; 39my $mailback = 0; 40my $summary_file = 0; 41my $show_types = 0; 42my $list_types = 0; 43my $fix = 0; 44my $fix_inplace = 0; 45my $root; 46my %debug; 47my %camelcase = (); 48my %use_type = (); 49my @use = (); 50my %ignore_type = (); 51my @ignore = (); 52my $help = 0; 53my $configuration_file = ".checkpatch.conf"; 54my $max_line_length = 80; 55my $ignore_perl_version = 0; 56my $minimum_perl_version = 5.10.0; 57my $min_conf_desc_length = 4; 58my $spelling_file = "$D/spelling.txt"; 59my $codespell = 0; 60my $codespellfile = "/usr/share/codespell/dictionary.txt"; 61my $conststructsfile = "$D/const_structs.checkpatch"; 62my $typedefsfile = ""; 63my $color = "auto"; 64my $allow_c99_comments = 1; # Can be overridden by --ignore C99_COMMENT_TOLERANCE 65# git output parsing needs US English output, so first set backtick child process LANGUAGE 66my $git_command ='export LANGUAGE=en_US.UTF-8; git'; 67 68sub help { 69 my ($exitcode) = @_; 70 71 print << "EOM"; 72Usage: $P [OPTION]... [FILE]... 73Version: $V 74 75Options: 76 -q, --quiet quiet 77 --no-tree run without a kernel tree 78 --no-signoff do not check for 'Signed-off-by' line 79 --patch treat FILE as patchfile (default) 80 --emacs emacs compile window format 81 --terse one line per report 82 --showfile emit diffed file position, not input file position 83 -g, --git treat FILE as a single commit or git revision range 84 single git commit with: 85 <rev> 86 <rev>^ 87 <rev>~n 88 multiple git commits with: 89 <rev1>..<rev2> 90 <rev1>...<rev2> 91 <rev>-<count> 92 git merges are ignored 93 -f, --file treat FILE as regular source file 94 --subjective, --strict enable more subjective tests 95 --list-types list the possible message types 96 --types TYPE(,TYPE2...) show only these comma separated message types 97 --ignore TYPE(,TYPE2...) ignore various comma separated message types 98 --show-types show the specific message type in the output 99 --max-line-length=n set the maximum line length, if exceeded, warn 100 --min-conf-desc-length=n set the min description length, if shorter, warn 101 --root=PATH PATH to the kernel tree root 102 --no-summary suppress the per-file summary 103 --mailback only produce a report in case of warnings/errors 104 --summary-file include the filename in summary 105 --debug KEY=[0|1] turn on/off debugging of KEY, where KEY is one of 106 'values', 'possible', 'type', and 'attr' (default 107 is all off) 108 --test-only=WORD report only warnings/errors containing WORD 109 literally 110 --fix EXPERIMENTAL - may create horrible results 111 If correctable single-line errors exist, create 112 "<inputfile>.EXPERIMENTAL-checkpatch-fixes" 113 with potential errors corrected to the preferred 114 checkpatch style 115 --fix-inplace EXPERIMENTAL - may create horrible results 116 Is the same as --fix, but overwrites the input 117 file. It's your fault if there's no backup or git 118 --ignore-perl-version override checking of perl version. expect 119 runtime errors. 120 --codespell Use the codespell dictionary for spelling/typos 121 (default:/usr/share/codespell/dictionary.txt) 122 --codespellfile Use this codespell dictionary 123 --typedefsfile Read additional types from this file 124 --color[=WHEN] Use colors 'always', 'never', or only when output 125 is a terminal ('auto'). Default is 'auto'. 126 -h, --help, --version display this help and exit 127 128When FILE is - read standard input. 129EOM 130 131 exit($exitcode); 132} 133 134sub uniq { 135 my %seen; 136 return grep { !$seen{$_}++ } @_; 137} 138 139sub list_types { 140 my ($exitcode) = @_; 141 142 my $count = 0; 143 144 local $/ = undef; 145 146 open(my $script, '<', abs_path($P)) or 147 die "$P: Can't read '$P' $!\n"; 148 149 my $text = <$script>; 150 close($script); 151 152 my @types = (); 153 # Also catch when type or level is passed through a variable 154 for ($text =~ /(?:(?:\bCHK|\bWARN|\bERROR|&\{\$msg_level})\s*\(|\$msg_type\s*=)\s*"([^"]+)"/g) { 155 push (@types, $_); 156 } 157 @types = sort(uniq(@types)); 158 print("#\tMessage type\n\n"); 159 foreach my $type (@types) { 160 print(++$count . "\t" . $type . "\n"); 161 } 162 163 exit($exitcode); 164} 165 166my $conf = which_conf($configuration_file); 167if (-f $conf) { 168 my @conf_args; 169 open(my $conffile, '<', "$conf") 170 or warn "$P: Can't find a readable $configuration_file file $!\n"; 171 172 while (<$conffile>) { 173 my $line = $_; 174 175 $line =~ s/\s*\n?$//g; 176 $line =~ s/^\s*//g; 177 $line =~ s/\s+/ /g; 178 179 next if ($line =~ m/^\s*#/); 180 next if ($line =~ m/^\s*$/); 181 182 my @words = split(" ", $line); 183 foreach my $word (@words) { 184 last if ($word =~ m/^#/); 185 push (@conf_args, $word); 186 } 187 } 188 close($conffile); 189 unshift(@ARGV, @conf_args) if @conf_args; 190} 191 192# Perl's Getopt::Long allows options to take optional arguments after a space. 193# Prevent --color by itself from consuming other arguments 194foreach (@ARGV) { 195 if ($_ eq "--color" || $_ eq "-color") { 196 $_ = "--color=$color"; 197 } 198} 199 200GetOptions( 201 'q|quiet+' => \$quiet, 202 'tree!' => \$tree, 203 'signoff!' => \$chk_signoff, 204 'patch!' => \$chk_patch, 205 'emacs!' => \$emacs, 206 'terse!' => \$terse, 207 'showfile!' => \$showfile, 208 'f|file!' => \$file, 209 'g|git!' => \$git, 210 'subjective!' => \$check, 211 'strict!' => \$check, 212 'ignore=s' => \@ignore, 213 'types=s' => \@use, 214 'show-types!' => \$show_types, 215 'list-types!' => \$list_types, 216 'max-line-length=i' => \$max_line_length, 217 'min-conf-desc-length=i' => \$min_conf_desc_length, 218 'root=s' => \$root, 219 'summary!' => \$summary, 220 'mailback!' => \$mailback, 221 'summary-file!' => \$summary_file, 222 'fix!' => \$fix, 223 'fix-inplace!' => \$fix_inplace, 224 'ignore-perl-version!' => \$ignore_perl_version, 225 'debug=s' => \%debug, 226 'test-only=s' => \$tst_only, 227 'codespell!' => \$codespell, 228 'codespellfile=s' => \$codespellfile, 229 'typedefsfile=s' => \$typedefsfile, 230 'color=s' => \$color, 231 'no-color' => \$color, #keep old behaviors of -nocolor 232 'nocolor' => \$color, #keep old behaviors of -nocolor 233 'h|help' => \$help, 234 'version' => \$help 235) or help(1); 236 237help(0) if ($help); 238 239list_types(0) if ($list_types); 240 241$fix = 1 if ($fix_inplace); 242$check_orig = $check; 243 244my $exit = 0; 245 246my $perl_version_ok = 1; 247if ($^V && $^V lt $minimum_perl_version) { 248 $perl_version_ok = 0; 249 printf "$P: requires at least perl version %vd\n", $minimum_perl_version; 250 exit(1) if (!$ignore_perl_version); 251} 252 253#if no filenames are given, push '-' to read patch from stdin 254if ($#ARGV < 0) { 255 push(@ARGV, '-'); 256} 257 258if ($color =~ /^[01]$/) { 259 $color = !$color; 260} elsif ($color =~ /^always$/i) { 261 $color = 1; 262} elsif ($color =~ /^never$/i) { 263 $color = 0; 264} elsif ($color =~ /^auto$/i) { 265 $color = (-t STDOUT); 266} else { 267 die "Invalid color mode: $color\n"; 268} 269 270sub hash_save_array_words { 271 my ($hashRef, $arrayRef) = @_; 272 273 my @array = split(/,/, join(',', @$arrayRef)); 274 foreach my $word (@array) { 275 $word =~ s/\s*\n?$//g; 276 $word =~ s/^\s*//g; 277 $word =~ s/\s+/ /g; 278 $word =~ tr/[a-z]/[A-Z]/; 279 280 next if ($word =~ m/^\s*#/); 281 next if ($word =~ m/^\s*$/); 282 283 $hashRef->{$word}++; 284 } 285} 286 287sub hash_show_words { 288 my ($hashRef, $prefix) = @_; 289 290 if (keys %$hashRef) { 291 print "\nNOTE: $prefix message types:"; 292 foreach my $word (sort keys %$hashRef) { 293 print " $word"; 294 } 295 print "\n"; 296 } 297} 298 299hash_save_array_words(\%ignore_type, \@ignore); 300hash_save_array_words(\%use_type, \@use); 301 302my $dbg_values = 0; 303my $dbg_possible = 0; 304my $dbg_type = 0; 305my $dbg_attr = 0; 306for my $key (keys %debug) { 307 ## no critic 308 eval "\${dbg_$key} = '$debug{$key}';"; 309 die "$@" if ($@); 310} 311 312my $rpt_cleaners = 0; 313 314if ($terse) { 315 $emacs = 1; 316 $quiet++; 317} 318 319if ($tree) { 320 if (defined $root) { 321 if (!top_of_kernel_tree($root)) { 322 die "$P: $root: --root does not point at a valid tree\n"; 323 } 324 } else { 325 if (top_of_kernel_tree('.')) { 326 $root = '.'; 327 } elsif ($0 =~ m@(.*)/scripts/[^/]*$@ && 328 top_of_kernel_tree($1)) { 329 $root = $1; 330 } 331 } 332 333 if (!defined $root) { 334 print "Must be run from the top-level dir. of a kernel tree\n"; 335 exit(2); 336 } 337} 338 339my $emitted_corrupt = 0; 340 341our $Ident = qr{ 342 [A-Za-z_][A-Za-z\d_]* 343 (?:\s*\#\#\s*[A-Za-z_][A-Za-z\d_]*)* 344 }x; 345our $Storage = qr{extern|static|asmlinkage}; 346our $Sparse = qr{ 347 __user| 348 __kernel| 349 __force| 350 __iomem| 351 __must_check| 352 __kprobes| 353 __ref| 354 __refconst| 355 __refdata| 356 __rcu| 357 __private 358 }x; 359our $InitAttributePrefix = qr{__(?:mem|cpu|dev|net_|)}; 360our $InitAttributeData = qr{$InitAttributePrefix(?:initdata\b)}; 361our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)}; 362our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)}; 363our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit}; 364 365# Notes to $Attribute: 366# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check 367our $Attribute = qr{ 368 const| 369 __percpu| 370 __nocast| 371 __safe| 372 __bitwise| 373 __packed__| 374 __packed2__| 375 __naked| 376 __maybe_unused| 377 __always_unused| 378 __noreturn| 379 __used| 380 __cold| 381 __pure| 382 __noclone| 383 __deprecated| 384 __read_mostly| 385 __ro_after_init| 386 __kprobes| 387 $InitAttribute| 388 ____cacheline_aligned| 389 ____cacheline_aligned_in_smp| 390 ____cacheline_internodealigned_in_smp| 391 __weak 392 }x; 393our $Modifier; 394our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__}; 395our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]}; 396our $Lval = qr{$Ident(?:$Member)*}; 397 398our $Int_type = qr{(?i)llu|ull|ll|lu|ul|l|u}; 399our $Binary = qr{(?i)0b[01]+$Int_type?}; 400our $Hex = qr{(?i)0x[0-9a-f]+$Int_type?}; 401our $Int = qr{[0-9]+$Int_type?}; 402our $Octal = qr{0[0-7]+$Int_type?}; 403our $String = qr{"[X\t]*"}; 404our $Float_hex = qr{(?i)0x[0-9a-f]+p-?[0-9]+[fl]?}; 405our $Float_dec = qr{(?i)(?:[0-9]+\.[0-9]*|[0-9]*\.[0-9]+)(?:e-?[0-9]+)?[fl]?}; 406our $Float_int = qr{(?i)[0-9]+e-?[0-9]+[fl]?}; 407our $Float = qr{$Float_hex|$Float_dec|$Float_int}; 408our $Constant = qr{$Float|$Binary|$Octal|$Hex|$Int}; 409our $Assignment = qr{\*\=|/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|=|=}; 410our $Compare = qr{<=|>=|==|!=|<|(?<!-)>}; 411our $Arithmetic = qr{\+|-|\*|\/|%}; 412our $Operators = qr{ 413 <=|>=|==|!=| 414 =>|->|<<|>>|<|>|!|~| 415 &&|\|\||,|\^|\+\+|--|&|\||$Arithmetic 416 }x; 417 418our $c90_Keywords = qr{do|for|while|if|else|return|goto|continue|switch|default|case|break}x; 419 420our $BasicType; 421our $NonptrType; 422our $NonptrTypeMisordered; 423our $NonptrTypeWithAttr; 424our $Type; 425our $TypeMisordered; 426our $Declare; 427our $DeclareMisordered; 428 429our $NON_ASCII_UTF8 = qr{ 430 [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte 431 | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs 432 | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte 433 | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates 434 | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3 435 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15 436 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16 437}x; 438 439our $UTF8 = qr{ 440 [\x09\x0A\x0D\x20-\x7E] # ASCII 441 | $NON_ASCII_UTF8 442}x; 443 444our $typeC99Typedefs = qr{(?:__)?(?:[us]_?)?int_?(?:8|16|32|64)_t}; 445our $typeOtherOSTypedefs = qr{(?x: 446 u_(?:char|short|int|long) | # bsd 447 u(?:nchar|short|int|long) # sysv 448)}; 449our $typeKernelTypedefs = qr{(?x: 450 (?:__)?(?:u|s|be|le)(?:8|16|32|64)| 451 atomic_t 452)}; 453our $typeTypedefs = qr{(?x: 454 $typeC99Typedefs\b| 455 $typeOtherOSTypedefs\b| 456 $typeKernelTypedefs\b 457)}; 458 459our $zero_initializer = qr{(?:(?:0[xX])?0+$Int_type?|NULL|false)\b}; 460 461our $logFunctions = qr{(?x: 462 printk(?:_ratelimited|_once|_deferred_once|_deferred|)| 463 (?:[a-z0-9]+_){1,2}(?:printk|emerg|alert|crit|err|warning|warn|notice|info|debug|dbg|vdbg|devel|cont|WARN)(?:_ratelimited|_once|)| 464 TP_printk| 465 WARN(?:_RATELIMIT|_ONCE|)| 466 panic| 467 MODULE_[A-Z_]+| 468 seq_vprintf|seq_printf|seq_puts 469)}; 470 471our $allocFunctions = qr{(?x: 472 (?:(?:devm_)? 473 (?:kv|k|v)[czm]alloc(?:_node|_array)? | 474 kstrdup(?:_const)? | 475 kmemdup(?:_nul)?) | 476 (?:\w+)?alloc_skb(?:ip_align)? | 477 # dev_alloc_skb/netdev_alloc_skb, et al 478 dma_alloc_coherent 479)}; 480 481our $signature_tags = qr{(?xi: 482 Signed-off-by:| 483 Co-developed-by:| 484 Acked-by:| 485 Tested-by:| 486 Reviewed-by:| 487 Reported-by:| 488 Suggested-by:| 489 To:| 490 Cc: 491)}; 492 493our @typeListMisordered = ( 494 qr{char\s+(?:un)?signed}, 495 qr{int\s+(?:(?:un)?signed\s+)?short\s}, 496 qr{int\s+short(?:\s+(?:un)?signed)}, 497 qr{short\s+int(?:\s+(?:un)?signed)}, 498 qr{(?:un)?signed\s+int\s+short}, 499 qr{short\s+(?:un)?signed}, 500 qr{long\s+int\s+(?:un)?signed}, 501 qr{int\s+long\s+(?:un)?signed}, 502 qr{long\s+(?:un)?signed\s+int}, 503 qr{int\s+(?:un)?signed\s+long}, 504 qr{int\s+(?:un)?signed}, 505 qr{int\s+long\s+long\s+(?:un)?signed}, 506 qr{long\s+long\s+int\s+(?:un)?signed}, 507 qr{long\s+long\s+(?:un)?signed\s+int}, 508 qr{long\s+long\s+(?:un)?signed}, 509 qr{long\s+(?:un)?signed}, 510); 511 512our @typeList = ( 513 qr{void}, 514 qr{(?:(?:un)?signed\s+)?char}, 515 qr{(?:(?:un)?signed\s+)?short\s+int}, 516 qr{(?:(?:un)?signed\s+)?short}, 517 qr{(?:(?:un)?signed\s+)?int}, 518 qr{(?:(?:un)?signed\s+)?long\s+int}, 519 qr{(?:(?:un)?signed\s+)?long\s+long\s+int}, 520 qr{(?:(?:un)?signed\s+)?long\s+long}, 521 qr{(?:(?:un)?signed\s+)?long}, 522 qr{(?:un)?signed}, 523 qr{float}, 524 qr{double}, 525 qr{bool}, 526 qr{struct\s+$Ident}, 527 qr{union\s+$Ident}, 528 qr{enum\s+$Ident}, 529 qr{${Ident}_t}, 530 qr{${Ident}_handler}, 531 qr{${Ident}_handler_fn}, 532 @typeListMisordered, 533); 534 535our $C90_int_types = qr{(?x: 536 long\s+long\s+int\s+(?:un)?signed| 537 long\s+long\s+(?:un)?signed\s+int| 538 long\s+long\s+(?:un)?signed| 539 (?:(?:un)?signed\s+)?long\s+long\s+int| 540 (?:(?:un)?signed\s+)?long\s+long| 541 int\s+long\s+long\s+(?:un)?signed| 542 int\s+(?:(?:un)?signed\s+)?long\s+long| 543 544 long\s+int\s+(?:un)?signed| 545 long\s+(?:un)?signed\s+int| 546 long\s+(?:un)?signed| 547 (?:(?:un)?signed\s+)?long\s+int| 548 (?:(?:un)?signed\s+)?long| 549 int\s+long\s+(?:un)?signed| 550 int\s+(?:(?:un)?signed\s+)?long| 551 552 int\s+(?:un)?signed| 553 (?:(?:un)?signed\s+)?int 554)}; 555 556our @typeListFile = (); 557our @typeListWithAttr = ( 558 @typeList, 559 qr{struct\s+$InitAttribute\s+$Ident}, 560 qr{union\s+$InitAttribute\s+$Ident}, 561); 562 563our @modifierList = ( 564 qr{fastcall}, 565); 566our @modifierListFile = (); 567 568our @mode_permission_funcs = ( 569 ["module_param", 3], 570 ["module_param_(?:array|named|string)", 4], 571 ["module_param_array_named", 5], 572 ["debugfs_create_(?:file|u8|u16|u32|u64|x8|x16|x32|x64|size_t|atomic_t|bool|blob|regset32|u32_array)", 2], 573 ["proc_create(?:_data|)", 2], 574 ["(?:CLASS|DEVICE|SENSOR|SENSOR_DEVICE|IIO_DEVICE)_ATTR", 2], 575 ["IIO_DEV_ATTR_[A-Z_]+", 1], 576 ["SENSOR_(?:DEVICE_|)ATTR_2", 2], 577 ["SENSOR_TEMPLATE(?:_2|)", 3], 578 ["__ATTR", 2], 579); 580 581#Create a search pattern for all these functions to speed up a loop below 582our $mode_perms_search = ""; 583foreach my $entry (@mode_permission_funcs) { 584 $mode_perms_search .= '|' if ($mode_perms_search ne ""); 585 $mode_perms_search .= $entry->[0]; 586} 587$mode_perms_search = "(?:${mode_perms_search})"; 588 589our %deprecated_apis = ( 590 "synchronize_rcu_bh" => "synchronize_rcu", 591 "synchronize_rcu_bh_expedited" => "synchronize_rcu_expedited", 592 "call_rcu_bh" => "call_rcu", 593 "rcu_barrier_bh" => "rcu_barrier", 594 "synchronize_sched" => "synchronize_rcu", 595 "synchronize_sched_expedited" => "synchronize_rcu_expedited", 596 "call_rcu_sched" => "call_rcu", 597 "rcu_barrier_sched" => "rcu_barrier", 598 "get_state_synchronize_sched" => "get_state_synchronize_rcu", 599 "cond_synchronize_sched" => "cond_synchronize_rcu", 600); 601 602#Create a search pattern for all these strings to speed up a loop below 603our $deprecated_apis_search = ""; 604foreach my $entry (keys %deprecated_apis) { 605 $deprecated_apis_search .= '|' if ($deprecated_apis_search ne ""); 606 $deprecated_apis_search .= $entry; 607} 608$deprecated_apis_search = "(?:${deprecated_apis_search})"; 609 610our $mode_perms_world_writable = qr{ 611 S_IWUGO | 612 S_IWOTH | 613 S_IRWXUGO | 614 S_IALLUGO | 615 0[0-7][0-7][2367] 616}x; 617 618our %mode_permission_string_types = ( 619 "S_IRWXU" => 0700, 620 "S_IRUSR" => 0400, 621 "S_IWUSR" => 0200, 622 "S_IXUSR" => 0100, 623 "S_IRWXG" => 0070, 624 "S_IRGRP" => 0040, 625 "S_IWGRP" => 0020, 626 "S_IXGRP" => 0010, 627 "S_IRWXO" => 0007, 628 "S_IROTH" => 0004, 629 "S_IWOTH" => 0002, 630 "S_IXOTH" => 0001, 631 "S_IRWXUGO" => 0777, 632 "S_IRUGO" => 0444, 633 "S_IWUGO" => 0222, 634 "S_IXUGO" => 0111, 635); 636 637#Create a search pattern for all these strings to speed up a loop below 638our $mode_perms_string_search = ""; 639foreach my $entry (keys %mode_permission_string_types) { 640 $mode_perms_string_search .= '|' if ($mode_perms_string_search ne ""); 641 $mode_perms_string_search .= $entry; 642} 643our $single_mode_perms_string_search = "(?:${mode_perms_string_search})"; 644our $multi_mode_perms_string_search = qr{ 645 ${single_mode_perms_string_search} 646 (?:\s*\|\s*${single_mode_perms_string_search})* 647}x; 648 649sub perms_to_octal { 650 my ($string) = @_; 651 652 return trim($string) if ($string =~ /^\s*0[0-7]{3,3}\s*$/); 653 654 my $val = ""; 655 my $oval = ""; 656 my $to = 0; 657 my $curpos = 0; 658 my $lastpos = 0; 659 while ($string =~ /\b(($single_mode_perms_string_search)\b(?:\s*\|\s*)?\s*)/g) { 660 $curpos = pos($string); 661 my $match = $2; 662 my $omatch = $1; 663 last if ($lastpos > 0 && ($curpos - length($omatch) != $lastpos)); 664 $lastpos = $curpos; 665 $to |= $mode_permission_string_types{$match}; 666 $val .= '\s*\|\s*' if ($val ne ""); 667 $val .= $match; 668 $oval .= $omatch; 669 } 670 $oval =~ s/^\s*\|\s*//; 671 $oval =~ s/\s*\|\s*$//; 672 return sprintf("%04o", $to); 673} 674 675our $allowed_asm_includes = qr{(?x: 676 irq| 677 memory| 678 time| 679 reboot 680)}; 681# memory.h: ARM has a custom one 682 683# Load common spelling mistakes and build regular expression list. 684my $misspellings; 685my %spelling_fix; 686 687if (open(my $spelling, '<', $spelling_file)) { 688 while (<$spelling>) { 689 my $line = $_; 690 691 $line =~ s/\s*\n?$//g; 692 $line =~ s/^\s*//g; 693 694 next if ($line =~ m/^\s*#/); 695 next if ($line =~ m/^\s*$/); 696 697 my ($suspect, $fix) = split(/\|\|/, $line); 698 699 $spelling_fix{$suspect} = $fix; 700 } 701 close($spelling); 702} else { 703 warn "No typos will be found - file '$spelling_file': $!\n"; 704} 705 706if ($codespell) { 707 if (open(my $spelling, '<', $codespellfile)) { 708 while (<$spelling>) { 709 my $line = $_; 710 711 $line =~ s/\s*\n?$//g; 712 $line =~ s/^\s*//g; 713 714 next if ($line =~ m/^\s*#/); 715 next if ($line =~ m/^\s*$/); 716 next if ($line =~ m/, disabled/i); 717 718 $line =~ s/,.*$//; 719 720 my ($suspect, $fix) = split(/->/, $line); 721 722 $spelling_fix{$suspect} = $fix; 723 } 724 close($spelling); 725 } else { 726 warn "No codespell typos will be found - file '$codespellfile': $!\n"; 727 } 728} 729 730$misspellings = join("|", sort keys %spelling_fix) if keys %spelling_fix; 731 732sub read_words { 733 my ($wordsRef, $file) = @_; 734 735 if (open(my $words, '<', $file)) { 736 while (<$words>) { 737 my $line = $_; 738 739 $line =~ s/\s*\n?$//g; 740 $line =~ s/^\s*//g; 741 742 next if ($line =~ m/^\s*#/); 743 next if ($line =~ m/^\s*$/); 744 if ($line =~ /\s/) { 745 print("$file: '$line' invalid - ignored\n"); 746 next; 747 } 748 749 $$wordsRef .= '|' if ($$wordsRef ne ""); 750 $$wordsRef .= $line; 751 } 752 close($file); 753 return 1; 754 } 755 756 return 0; 757} 758 759my $const_structs = ""; 760read_words(\$const_structs, $conststructsfile) 761 or warn "No structs that should be const will be found - file '$conststructsfile': $!\n"; 762 763my $typeOtherTypedefs = ""; 764if (length($typedefsfile)) { 765 read_words(\$typeOtherTypedefs, $typedefsfile) 766 or warn "No additional types will be considered - file '$typedefsfile': $!\n"; 767} 768$typeTypedefs .= '|' . $typeOtherTypedefs if ($typeOtherTypedefs ne ""); 769 770sub build_types { 771 my $mods = "(?x: \n" . join("|\n ", (@modifierList, @modifierListFile)) . "\n)"; 772 my $all = "(?x: \n" . join("|\n ", (@typeList, @typeListFile)) . "\n)"; 773 my $Misordered = "(?x: \n" . join("|\n ", @typeListMisordered) . "\n)"; 774 my $allWithAttr = "(?x: \n" . join("|\n ", @typeListWithAttr) . "\n)"; 775 $Modifier = qr{(?:$Attribute|$Sparse|$mods)}; 776 $BasicType = qr{ 777 (?:$typeTypedefs\b)| 778 (?:${all}\b) 779 }x; 780 $NonptrType = qr{ 781 (?:$Modifier\s+|const\s+)* 782 (?: 783 (?:typeof|__typeof__)\s*\([^\)]*\)| 784 (?:$typeTypedefs\b)| 785 (?:${all}\b) 786 ) 787 (?:\s+$Modifier|\s+const)* 788 }x; 789 $NonptrTypeMisordered = qr{ 790 (?:$Modifier\s+|const\s+)* 791 (?: 792 (?:${Misordered}\b) 793 ) 794 (?:\s+$Modifier|\s+const)* 795 }x; 796 $NonptrTypeWithAttr = qr{ 797 (?:$Modifier\s+|const\s+)* 798 (?: 799 (?:typeof|__typeof__)\s*\([^\)]*\)| 800 (?:$typeTypedefs\b)| 801 (?:${allWithAttr}\b) 802 ) 803 (?:\s+$Modifier|\s+const)* 804 }x; 805 $Type = qr{ 806 $NonptrType 807 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)? 808 (?:\s+$Inline|\s+$Modifier)* 809 }x; 810 $TypeMisordered = qr{ 811 $NonptrTypeMisordered 812 (?:(?:\s|\*|\[\])+\s*const|(?:\s|\*\s*(?:const\s*)?|\[\])+|(?:\s*\[\s*\])+)? 813 (?:\s+$Inline|\s+$Modifier)* 814 }x; 815 $Declare = qr{(?:$Storage\s+(?:$Inline\s+)?)?$Type}; 816 $DeclareMisordered = qr{(?:$Storage\s+(?:$Inline\s+)?)?$TypeMisordered}; 817} 818build_types(); 819 820our $Typecast = qr{\s*(\(\s*$NonptrType\s*\)){0,1}\s*}; 821 822# Using $balanced_parens, $LvalOrFunc, or $FuncArg 823# requires at least perl version v5.10.0 824# Any use must be runtime checked with $^V 825 826our $balanced_parens = qr/(\((?:[^\(\)]++|(?-1))*\))/; 827our $LvalOrFunc = qr{((?:[\&\*]\s*)?$Lval)\s*($balanced_parens{0,1})\s*}; 828our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)}; 829 830our $declaration_macros = qr{(?x: 831 (?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,6}\s*\(| 832 (?:$Storage\s+)?[HLP]?LIST_HEAD\s*\(| 833 (?:$Storage\s+)?${Type}\s+uninitialized_var\s*\(| 834 (?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\( 835)}; 836 837sub deparenthesize { 838 my ($string) = @_; 839 return "" if (!defined($string)); 840 841 while ($string =~ /^\s*\(.*\)\s*$/) { 842 $string =~ s@^\s*\(\s*@@; 843 $string =~ s@\s*\)\s*$@@; 844 } 845 846 $string =~ s@\s+@ @g; 847 848 return $string; 849} 850 851sub seed_camelcase_file { 852 my ($file) = @_; 853 854 return if (!(-f $file)); 855 856 local $/; 857 858 open(my $include_file, '<', "$file") 859 or warn "$P: Can't read '$file' $!\n"; 860 my $text = <$include_file>; 861 close($include_file); 862 863 my @lines = split('\n', $text); 864 865 foreach my $line (@lines) { 866 next if ($line !~ /(?:[A-Z][a-z]|[a-z][A-Z])/); 867 if ($line =~ /^[ \t]*(?:#[ \t]*define|typedef\s+$Type)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)/) { 868 $camelcase{$1} = 1; 869 } elsif ($line =~ /^\s*$Declare\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[\(\[,;]/) { 870 $camelcase{$1} = 1; 871 } elsif ($line =~ /^\s*(?:union|struct|enum)\s+(\w*(?:[A-Z][a-z]|[a-z][A-Z])\w*)\s*[;\{]/) { 872 $camelcase{$1} = 1; 873 } 874 } 875} 876 877sub is_maintained_obsolete { 878 my ($filename) = @_; 879 880 return 0 if (!$tree || !(-e "$root/scripts/get_maintainer.pl")); 881 882 my $status = `perl $root/scripts/get_maintainer.pl --status --nom --nol --nogit --nogit-fallback -f $filename 2>&1`; 883 884 return $status =~ /obsolete/i; 885} 886 887sub is_SPDX_License_valid { 888 my ($license) = @_; 889 890 return 1 if (!$tree || which("python") eq "" || !(-e "$root/scripts/spdxcheck.py") || !(-e "$root/.git")); 891 892 my $root_path = abs_path($root); 893 my $status = `cd "$root_path"; echo "$license" | python scripts/spdxcheck.py -`; 894 return 0 if ($status ne ""); 895 return 1; 896} 897 898my $camelcase_seeded = 0; 899sub seed_camelcase_includes { 900 return if ($camelcase_seeded); 901 902 my $files; 903 my $camelcase_cache = ""; 904 my @include_files = (); 905 906 $camelcase_seeded = 1; 907 908 if (-e ".git") { 909 my $git_last_include_commit = `${git_command} log --no-merges --pretty=format:"%h%n" -1 -- include`; 910 chomp $git_last_include_commit; 911 $camelcase_cache = ".checkpatch-camelcase.git.$git_last_include_commit"; 912 } else { 913 my $last_mod_date = 0; 914 $files = `find $root/include -name "*.h"`; 915 @include_files = split('\n', $files); 916 foreach my $file (@include_files) { 917 my $date = POSIX::strftime("%Y%m%d%H%M", 918 localtime((stat $file)[9])); 919 $last_mod_date = $date if ($last_mod_date < $date); 920 } 921 $camelcase_cache = ".checkpatch-camelcase.date.$last_mod_date"; 922 } 923 924 if ($camelcase_cache ne "" && -f $camelcase_cache) { 925 open(my $camelcase_file, '<', "$camelcase_cache") 926 or warn "$P: Can't read '$camelcase_cache' $!\n"; 927 while (<$camelcase_file>) { 928 chomp; 929 $camelcase{$_} = 1; 930 } 931 close($camelcase_file); 932 933 return; 934 } 935 936 if (-e ".git") { 937 $files = `${git_command} ls-files "include/*.h"`; 938 @include_files = split('\n', $files); 939 } 940 941 foreach my $file (@include_files) { 942 seed_camelcase_file($file); 943 } 944 945 if ($camelcase_cache ne "") { 946 unlink glob ".checkpatch-camelcase.*"; 947 open(my $camelcase_file, '>', "$camelcase_cache") 948 or warn "$P: Can't write '$camelcase_cache' $!\n"; 949 foreach (sort { lc($a) cmp lc($b) } keys(%camelcase)) { 950 print $camelcase_file ("$_\n"); 951 } 952 close($camelcase_file); 953 } 954} 955 956sub git_commit_info { 957 my ($commit, $id, $desc) = @_; 958 959 return ($id, $desc) if ((which("git") eq "") || !(-e ".git")); 960 961 my $output = `${git_command} log --no-color --format='%H %s' -1 $commit 2>&1`; 962 $output =~ s/^\s*//gm; 963 my @lines = split("\n", $output); 964 965 return ($id, $desc) if ($#lines < 0); 966 967 if ($lines[0] =~ /^error: short SHA1 $commit is ambiguous/) { 968# Maybe one day convert this block of bash into something that returns 969# all matching commit ids, but it's very slow... 970# 971# echo "checking commits $1..." 972# git rev-list --remotes | grep -i "^$1" | 973# while read line ; do 974# git log --format='%H %s' -1 $line | 975# echo "commit $(cut -c 1-12,41-)" 976# done 977 } elsif ($lines[0] =~ /^fatal: ambiguous argument '$commit': unknown revision or path not in the working tree\./) { 978 $id = undef; 979 } else { 980 $id = substr($lines[0], 0, 12); 981 $desc = substr($lines[0], 41); 982 } 983 984 return ($id, $desc); 985} 986 987$chk_signoff = 0 if ($file); 988 989my @rawlines = (); 990my @lines = (); 991my @fixed = (); 992my @fixed_inserted = (); 993my @fixed_deleted = (); 994my $fixlinenr = -1; 995 996# If input is git commits, extract all commits from the commit expressions. 997# For example, HEAD-3 means we need check 'HEAD, HEAD~1, HEAD~2'. 998die "$P: No git repository found\n" if ($git && !-e ".git"); 999 1000if ($git) { 1001 my @commits = (); 1002 foreach my $commit_expr (@ARGV) { 1003 my $git_range; 1004 if ($commit_expr =~ m/^(.*)-(\d+)$/) { 1005 $git_range = "-$2 $1"; 1006 } elsif ($commit_expr =~ m/\.\./) { 1007 $git_range = "$commit_expr"; 1008 } else { 1009 $git_range = "-1 $commit_expr"; 1010 } 1011 my $lines = `${git_command} log --no-color --no-merges --pretty=format:'%H %s' $git_range`; 1012 foreach my $line (split(/\n/, $lines)) { 1013 $line =~ /^([0-9a-fA-F]{40,40}) (.*)$/; 1014 next if (!defined($1) || !defined($2)); 1015 my $sha1 = $1; 1016 my $subject = $2; 1017 unshift(@commits, $sha1); 1018 $git_commits{$sha1} = $subject; 1019 } 1020 } 1021 die "$P: no git commits after extraction!\n" if (@commits == 0); 1022 @ARGV = @commits; 1023} 1024 1025my $vname; 1026$allow_c99_comments = !defined $ignore_type{"C99_COMMENT_TOLERANCE"}; 1027for my $filename (@ARGV) { 1028 my $FILE; 1029 if ($git) { 1030 open($FILE, '-|', "git format-patch -M --stdout -1 $filename") || 1031 die "$P: $filename: git format-patch failed - $!\n"; 1032 } elsif ($file) { 1033 open($FILE, '-|', "diff -u /dev/null $filename") || 1034 die "$P: $filename: diff failed - $!\n"; 1035 } elsif ($filename eq '-') { 1036 open($FILE, '<&STDIN'); 1037 } else { 1038 open($FILE, '<', "$filename") || 1039 die "$P: $filename: open failed - $!\n"; 1040 } 1041 if ($filename eq '-') { 1042 $vname = 'Your patch'; 1043 } elsif ($git) { 1044 $vname = "Commit " . substr($filename, 0, 12) . ' ("' . $git_commits{$filename} . '")'; 1045 } else { 1046 $vname = $filename; 1047 } 1048 while (<$FILE>) { 1049 chomp; 1050 push(@rawlines, $_); 1051 } 1052 close($FILE); 1053 1054 if ($#ARGV > 0 && $quiet == 0) { 1055 print '-' x length($vname) . "\n"; 1056 print "$vname\n"; 1057 print '-' x length($vname) . "\n"; 1058 } 1059 1060 if (!process($filename)) { 1061 $exit = 1; 1062 } 1063 @rawlines = (); 1064 @lines = (); 1065 @fixed = (); 1066 @fixed_inserted = (); 1067 @fixed_deleted = (); 1068 $fixlinenr = -1; 1069 @modifierListFile = (); 1070 @typeListFile = (); 1071 build_types(); 1072} 1073 1074if (!$quiet) { 1075 hash_show_words(\%use_type, "Used"); 1076 hash_show_words(\%ignore_type, "Ignored"); 1077 1078 if (!$perl_version_ok) { 1079 print << "EOM" 1080 1081NOTE: perl $^V is not modern enough to detect all possible issues. 1082 An upgrade to at least perl $minimum_perl_version is suggested. 1083EOM 1084 } 1085 if ($exit) { 1086 print << "EOM" 1087 1088NOTE: If any of the errors are false positives, please report 1089 them to the maintainer, see CHECKPATCH in MAINTAINERS. 1090EOM 1091 } 1092} 1093 1094exit($exit); 1095 1096sub top_of_kernel_tree { 1097 my ($root) = @_; 1098 1099 my @tree_check = ( 1100 "COPYING", "CREDITS", "Kbuild", "MAINTAINERS", "Makefile", 1101 "README", "Documentation", "arch", "include", "drivers", 1102 "fs", "init", "ipc", "kernel", "lib", "scripts", 1103 ); 1104 1105 foreach my $check (@tree_check) { 1106 if (! -e $root . '/' . $check) { 1107 return 0; 1108 } 1109 } 1110 return 1; 1111} 1112 1113sub parse_email { 1114 my ($formatted_email) = @_; 1115 1116 my $name = ""; 1117 my $address = ""; 1118 my $comment = ""; 1119 1120 if ($formatted_email =~ /^(.*)<(\S+\@\S+)>(.*)$/) { 1121 $name = $1; 1122 $address = $2; 1123 $comment = $3 if defined $3; 1124 } elsif ($formatted_email =~ /^\s*<(\S+\@\S+)>(.*)$/) { 1125 $address = $1; 1126 $comment = $2 if defined $2; 1127 } elsif ($formatted_email =~ /(\S+\@\S+)(.*)$/) { 1128 $address = $1; 1129 $comment = $2 if defined $2; 1130 $formatted_email =~ s/\Q$address\E.*$//; 1131 $name = $formatted_email; 1132 $name = trim($name); 1133 $name =~ s/^\"|\"$//g; 1134 # If there's a name left after stripping spaces and 1135 # leading quotes, and the address doesn't have both 1136 # leading and trailing angle brackets, the address 1137 # is invalid. ie: 1138 # "joe smith joe@smith.com" bad 1139 # "joe smith <joe@smith.com" bad 1140 if ($name ne "" && $address !~ /^<[^>]+>$/) { 1141 $name = ""; 1142 $address = ""; 1143 $comment = ""; 1144 } 1145 } 1146 1147 $name = trim($name); 1148 $name =~ s/^\"|\"$//g; 1149 $address = trim($address); 1150 $address =~ s/^\<|\>$//g; 1151 1152 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars 1153 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes 1154 $name = "\"$name\""; 1155 } 1156 1157 return ($name, $address, $comment); 1158} 1159 1160sub format_email { 1161 my ($name, $address) = @_; 1162 1163 my $formatted_email; 1164 1165 $name = trim($name); 1166 $name =~ s/^\"|\"$//g; 1167 $address = trim($address); 1168 1169 if ($name =~ /[^\w \-]/i) { ##has "must quote" chars 1170 $name =~ s/(?<!\\)"/\\"/g; ##escape quotes 1171 $name = "\"$name\""; 1172 } 1173 1174 if ("$name" eq "") { 1175 $formatted_email = "$address"; 1176 } else { 1177 $formatted_email = "$name <$address>"; 1178 } 1179 1180 return $formatted_email; 1181} 1182 1183sub which { 1184 my ($bin) = @_; 1185 1186 foreach my $path (split(/:/, $ENV{PATH})) { 1187 if (-e "$path/$bin") { 1188 return "$path/$bin"; 1189 } 1190 } 1191 1192 return ""; 1193} 1194 1195sub which_conf { 1196 my ($conf) = @_; 1197 1198 foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) { 1199 if (-e "$path/$conf") { 1200 return "$path/$conf"; 1201 } 1202 } 1203 1204 return ""; 1205} 1206 1207sub expand_tabs { 1208 my ($str) = @_; 1209 1210 my $res = ''; 1211 my $n = 0; 1212 for my $c (split(//, $str)) { 1213 if ($c eq "\t") { 1214 $res .= ' '; 1215 $n++; 1216 for (; ($n % 8) != 0; $n++) { 1217 $res .= ' '; 1218 } 1219 next; 1220 } 1221 $res .= $c; 1222 $n++; 1223 } 1224 1225 return $res; 1226} 1227sub copy_spacing { 1228 (my $res = shift) =~ tr/\t/ /c; 1229 return $res; 1230} 1231 1232sub line_stats { 1233 my ($line) = @_; 1234 1235 # Drop the diff line leader and expand tabs 1236 $line =~ s/^.//; 1237 $line = expand_tabs($line); 1238 1239 # Pick the indent from the front of the line. 1240 my ($white) = ($line =~ /^(\s*)/); 1241 1242 return (length($line), length($white)); 1243} 1244 1245my $sanitise_quote = ''; 1246 1247sub sanitise_line_reset { 1248 my ($in_comment) = @_; 1249 1250 if ($in_comment) { 1251 $sanitise_quote = '*/'; 1252 } else { 1253 $sanitise_quote = ''; 1254 } 1255} 1256sub sanitise_line { 1257 my ($line) = @_; 1258 1259 my $res = ''; 1260 my $l = ''; 1261 1262 my $qlen = 0; 1263 my $off = 0; 1264 my $c; 1265 1266 # Always copy over the diff marker. 1267 $res = substr($line, 0, 1); 1268 1269 for ($off = 1; $off < length($line); $off++) { 1270 $c = substr($line, $off, 1); 1271 1272 # Comments we are whacking completely including the begin 1273 # and end, all to $;. 1274 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '/*') { 1275 $sanitise_quote = '*/'; 1276 1277 substr($res, $off, 2, "$;$;"); 1278 $off++; 1279 next; 1280 } 1281 if ($sanitise_quote eq '*/' && substr($line, $off, 2) eq '*/') { 1282 $sanitise_quote = ''; 1283 substr($res, $off, 2, "$;$;"); 1284 $off++; 1285 next; 1286 } 1287 if ($sanitise_quote eq '' && substr($line, $off, 2) eq '//') { 1288 $sanitise_quote = '//'; 1289 1290 substr($res, $off, 2, $sanitise_quote); 1291 $off++; 1292 next; 1293 } 1294 1295 # A \ in a string means ignore the next character. 1296 if (($sanitise_quote eq "'" || $sanitise_quote eq '"') && 1297 $c eq "\\") { 1298 substr($res, $off, 2, 'XX'); 1299 $off++; 1300 next; 1301 } 1302 # Regular quotes. 1303 if ($c eq "'" || $c eq '"') { 1304 if ($sanitise_quote eq '') { 1305 $sanitise_quote = $c; 1306 1307 substr($res, $off, 1, $c); 1308 next; 1309 } elsif ($sanitise_quote eq $c) { 1310 $sanitise_quote = ''; 1311 } 1312 } 1313 1314 #print "c<$c> SQ<$sanitise_quote>\n"; 1315 if ($off != 0 && $sanitise_quote eq '*/' && $c ne "\t") { 1316 substr($res, $off, 1, $;); 1317 } elsif ($off != 0 && $sanitise_quote eq '//' && $c ne "\t") { 1318 substr($res, $off, 1, $;); 1319 } elsif ($off != 0 && $sanitise_quote && $c ne "\t") { 1320 substr($res, $off, 1, 'X'); 1321 } else { 1322 substr($res, $off, 1, $c); 1323 } 1324 } 1325 1326 if ($sanitise_quote eq '//') { 1327 $sanitise_quote = ''; 1328 } 1329 1330 # The pathname on a #include may be surrounded by '<' and '>'. 1331 if ($res =~ /^.\s*\#\s*include\s+\<(.*)\>/) { 1332 my $clean = 'X' x length($1); 1333 $res =~ s@\<.*\>@<$clean>@; 1334 1335 # The whole of a #error is a string. 1336 } elsif ($res =~ /^.\s*\#\s*(?:error|warning)\s+(.*)\b/) { 1337 my $clean = 'X' x length($1); 1338 $res =~ s@(\#\s*(?:error|warning)\s+).*@$1$clean@; 1339 } 1340 1341 if ($allow_c99_comments && $res =~ m@(//.*$)@) { 1342 my $match = $1; 1343 $res =~ s/\Q$match\E/"$;" x length($match)/e; 1344 } 1345 1346 return $res; 1347} 1348 1349sub get_quoted_string { 1350 my ($line, $rawline) = @_; 1351 1352 return "" if (!defined($line) || !defined($rawline)); 1353 return "" if ($line !~ m/($String)/g); 1354 return substr($rawline, $-[0], $+[0] - $-[0]); 1355} 1356 1357sub ctx_statement_block { 1358 my ($linenr, $remain, $off) = @_; 1359 my $line = $linenr - 1; 1360 my $blk = ''; 1361 my $soff = $off; 1362 my $coff = $off - 1; 1363 my $coff_set = 0; 1364 1365 my $loff = 0; 1366 1367 my $type = ''; 1368 my $level = 0; 1369 my @stack = (); 1370 my $p; 1371 my $c; 1372 my $len = 0; 1373 1374 my $remainder; 1375 while (1) { 1376 @stack = (['', 0]) if ($#stack == -1); 1377 1378 #warn "CSB: blk<$blk> remain<$remain>\n"; 1379 # If we are about to drop off the end, pull in more 1380 # context. 1381 if ($off >= $len) { 1382 for (; $remain > 0; $line++) { 1383 last if (!defined $lines[$line]); 1384 next if ($lines[$line] =~ /^-/); 1385 $remain--; 1386 $loff = $len; 1387 $blk .= $lines[$line] . "\n"; 1388 $len = length($blk); 1389 $line++; 1390 last; 1391 } 1392 # Bail if there is no further context. 1393 #warn "CSB: blk<$blk> off<$off> len<$len>\n"; 1394 if ($off >= $len) { 1395 last; 1396 } 1397 if ($level == 0 && substr($blk, $off) =~ /^.\s*#\s*define/) { 1398 $level++; 1399 $type = '#'; 1400 } 1401 } 1402 $p = $c; 1403 $c = substr($blk, $off, 1); 1404 $remainder = substr($blk, $off); 1405 1406 #warn "CSB: c<$c> type<$type> level<$level> remainder<$remainder> coff_set<$coff_set>\n"; 1407 1408 # Handle nested #if/#else. 1409 if ($remainder =~ /^#\s*(?:ifndef|ifdef|if)\s/) { 1410 push(@stack, [ $type, $level ]); 1411 } elsif ($remainder =~ /^#\s*(?:else|elif)\b/) { 1412 ($type, $level) = @{$stack[$#stack - 1]}; 1413 } elsif ($remainder =~ /^#\s*endif\b/) { 1414 ($type, $level) = @{pop(@stack)}; 1415 } 1416 1417 # Statement ends at the ';' or a close '}' at the 1418 # outermost level. 1419 if ($level == 0 && $c eq ';') { 1420 last; 1421 } 1422 1423 # An else is really a conditional as long as its not else if 1424 if ($level == 0 && $coff_set == 0 && 1425 (!defined($p) || $p =~ /(?:\s|\}|\+)/) && 1426 $remainder =~ /^(else)(?:\s|{)/ && 1427 $remainder !~ /^else\s+if\b/) { 1428 $coff = $off + length($1) - 1; 1429 $coff_set = 1; 1430 #warn "CSB: mark coff<$coff> soff<$soff> 1<$1>\n"; 1431 #warn "[" . substr($blk, $soff, $coff - $soff + 1) . "]\n"; 1432 } 1433 1434 if (($type eq '' || $type eq '(') && $c eq '(') { 1435 $level++; 1436 $type = '('; 1437 } 1438 if ($type eq '(' && $c eq ')') { 1439 $level--; 1440 $type = ($level != 0)? '(' : ''; 1441 1442 if ($level == 0 && $coff < $soff) { 1443 $coff = $off; 1444 $coff_set = 1; 1445 #warn "CSB: mark coff<$coff>\n"; 1446 } 1447 } 1448 if (($type eq '' || $type eq '{') && $c eq '{') { 1449 $level++; 1450 $type = '{'; 1451 } 1452 if ($type eq '{' && $c eq '}') { 1453 $level--; 1454 $type = ($level != 0)? '{' : ''; 1455 1456 if ($level == 0) { 1457 if (substr($blk, $off + 1, 1) eq ';') { 1458 $off++; 1459 } 1460 last; 1461 } 1462 } 1463 # Preprocessor commands end at the newline unless escaped. 1464 if ($type eq '#' && $c eq "\n" && $p ne "\\") { 1465 $level--; 1466 $type = ''; 1467 $off++; 1468 last; 1469 } 1470 $off++; 1471 } 1472 # We are truly at the end, so shuffle to the next line. 1473 if ($off == $len) { 1474 $loff = $len + 1; 1475 $line++; 1476 $remain--; 1477 } 1478 1479 my $statement = substr($blk, $soff, $off - $soff + 1); 1480 my $condition = substr($blk, $soff, $coff - $soff + 1); 1481 1482 #warn "STATEMENT<$statement>\n"; 1483 #warn "CONDITION<$condition>\n"; 1484 1485 #print "coff<$coff> soff<$off> loff<$loff>\n"; 1486 1487 return ($statement, $condition, 1488 $line, $remain + 1, $off - $loff + 1, $level); 1489} 1490 1491sub statement_lines { 1492 my ($stmt) = @_; 1493 1494 # Strip the diff line prefixes and rip blank lines at start and end. 1495 $stmt =~ s/(^|\n)./$1/g; 1496 $stmt =~ s/^\s*//; 1497 $stmt =~ s/\s*$//; 1498 1499 my @stmt_lines = ($stmt =~ /\n/g); 1500 1501 return $#stmt_lines + 2; 1502} 1503 1504sub statement_rawlines { 1505 my ($stmt) = @_; 1506 1507 my @stmt_lines = ($stmt =~ /\n/g); 1508 1509 return $#stmt_lines + 2; 1510} 1511 1512sub statement_block_size { 1513 my ($stmt) = @_; 1514 1515 $stmt =~ s/(^|\n)./$1/g; 1516 $stmt =~ s/^\s*{//; 1517 $stmt =~ s/}\s*$//; 1518 $stmt =~ s/^\s*//; 1519 $stmt =~ s/\s*$//; 1520 1521 my @stmt_lines = ($stmt =~ /\n/g); 1522 my @stmt_statements = ($stmt =~ /;/g); 1523 1524 my $stmt_lines = $#stmt_lines + 2; 1525 my $stmt_statements = $#stmt_statements + 1; 1526 1527 if ($stmt_lines > $stmt_statements) { 1528 return $stmt_lines; 1529 } else { 1530 return $stmt_statements; 1531 } 1532} 1533 1534sub ctx_statement_full { 1535 my ($linenr, $remain, $off) = @_; 1536 my ($statement, $condition, $level); 1537 1538 my (@chunks); 1539 1540 # Grab the first conditional/block pair. 1541 ($statement, $condition, $linenr, $remain, $off, $level) = 1542 ctx_statement_block($linenr, $remain, $off); 1543 #print "F: c<$condition> s<$statement> remain<$remain>\n"; 1544 push(@chunks, [ $condition, $statement ]); 1545 if (!($remain > 0 && $condition =~ /^\s*(?:\n[+-])?\s*(?:if|else|do)\b/s)) { 1546 return ($level, $linenr, @chunks); 1547 } 1548 1549 # Pull in the following conditional/block pairs and see if they 1550 # could continue the statement. 1551 for (;;) { 1552 ($statement, $condition, $linenr, $remain, $off, $level) = 1553 ctx_statement_block($linenr, $remain, $off); 1554 #print "C: c<$condition> s<$statement> remain<$remain>\n"; 1555 last if (!($remain > 0 && $condition =~ /^(?:\s*\n[+-])*\s*(?:else|do)\b/s)); 1556 #print "C: push\n"; 1557 push(@chunks, [ $condition, $statement ]); 1558 } 1559 1560 return ($level, $linenr, @chunks); 1561} 1562 1563sub ctx_block_get { 1564 my ($linenr, $remain, $outer, $open, $close, $off) = @_; 1565 my $line; 1566 my $start = $linenr - 1; 1567 my $blk = ''; 1568 my @o; 1569 my @c; 1570 my @res = (); 1571 1572 my $level = 0; 1573 my @stack = ($level); 1574 for ($line = $start; $remain > 0; $line++) { 1575 next if ($rawlines[$line] =~ /^-/); 1576 $remain--; 1577 1578 $blk .= $rawlines[$line]; 1579 1580 # Handle nested #if/#else. 1581 if ($lines[$line] =~ /^.\s*#\s*(?:ifndef|ifdef|if)\s/) { 1582 push(@stack, $level); 1583 } elsif ($lines[$line] =~ /^.\s*#\s*(?:else|elif)\b/) { 1584 $level = $stack[$#stack - 1]; 1585 } elsif ($lines[$line] =~ /^.\s*#\s*endif\b/) { 1586 $level = pop(@stack); 1587 } 1588 1589 foreach my $c (split(//, $lines[$line])) { 1590 ##print "C<$c>L<$level><$open$close>O<$off>\n"; 1591 if ($off > 0) { 1592 $off--; 1593 next; 1594 } 1595 1596 if ($c eq $close && $level > 0) { 1597 $level--; 1598 last if ($level == 0); 1599 } elsif ($c eq $open) { 1600 $level++; 1601 } 1602 } 1603 1604 if (!$outer || $level <= 1) { 1605 push(@res, $rawlines[$line]); 1606 } 1607 1608 last if ($level == 0); 1609 } 1610 1611 return ($level, @res); 1612} 1613sub ctx_block_outer { 1614 my ($linenr, $remain) = @_; 1615 1616 my ($level, @r) = ctx_block_get($linenr, $remain, 1, '{', '}', 0); 1617 return @r; 1618} 1619sub ctx_block { 1620 my ($linenr, $remain) = @_; 1621 1622 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '{', '}', 0); 1623 return @r; 1624} 1625sub ctx_statement { 1626 my ($linenr, $remain, $off) = @_; 1627 1628 my ($level, @r) = ctx_block_get($linenr, $remain, 0, '(', ')', $off); 1629 return @r; 1630} 1631sub ctx_block_level { 1632 my ($linenr, $remain) = @_; 1633 1634 return ctx_block_get($linenr, $remain, 0, '{', '}', 0); 1635} 1636sub ctx_statement_level { 1637 my ($linenr, $remain, $off) = @_; 1638 1639 return ctx_block_get($linenr, $remain, 0, '(', ')', $off); 1640} 1641 1642sub ctx_locate_comment { 1643 my ($first_line, $end_line) = @_; 1644 1645 # Catch a comment on the end of the line itself. 1646 my ($current_comment) = ($rawlines[$end_line - 1] =~ m@.*(/\*.*\*/)\s*(?:\\\s*)?$@); 1647 return $current_comment if (defined $current_comment); 1648 1649 # Look through the context and try and figure out if there is a 1650 # comment. 1651 my $in_comment = 0; 1652 $current_comment = ''; 1653 for (my $linenr = $first_line; $linenr < $end_line; $linenr++) { 1654 my $line = $rawlines[$linenr - 1]; 1655 #warn " $line\n"; 1656 if ($linenr == $first_line and $line =~ m@^.\s*\*@) { 1657 $in_comment = 1; 1658 } 1659 if ($line =~ m@/\*@) { 1660 $in_comment = 1; 1661 } 1662 if (!$in_comment && $current_comment ne '') { 1663 $current_comment = ''; 1664 } 1665 $current_comment .= $line . "\n" if ($in_comment); 1666 if ($line =~ m@\*/@) { 1667 $in_comment = 0; 1668 } 1669 } 1670 1671 chomp($current_comment); 1672 return($current_comment); 1673} 1674sub ctx_has_comment { 1675 my ($first_line, $end_line) = @_; 1676 my $cmt = ctx_locate_comment($first_line, $end_line); 1677 1678 ##print "LINE: $rawlines[$end_line - 1 ]\n"; 1679 ##print "CMMT: $cmt\n"; 1680 1681 return ($cmt ne ''); 1682} 1683 1684sub raw_line { 1685 my ($linenr, $cnt) = @_; 1686 1687 my $offset = $linenr - 1; 1688 $cnt++; 1689 1690 my $line; 1691 while ($cnt) { 1692 $line = $rawlines[$offset++]; 1693 next if (defined($line) && $line =~ /^-/); 1694 $cnt--; 1695 } 1696 1697 return $line; 1698} 1699 1700sub get_stat_real { 1701 my ($linenr, $lc) = @_; 1702 1703 my $stat_real = raw_line($linenr, 0); 1704 for (my $count = $linenr + 1; $count <= $lc; $count++) { 1705 $stat_real = $stat_real . "\n" . raw_line($count, 0); 1706 } 1707 1708 return $stat_real; 1709} 1710 1711sub get_stat_here { 1712 my ($linenr, $cnt, $here) = @_; 1713 1714 my $herectx = $here . "\n"; 1715 for (my $n = 0; $n < $cnt; $n++) { 1716 $herectx .= raw_line($linenr, $n) . "\n"; 1717 } 1718 1719 return $herectx; 1720} 1721 1722sub cat_vet { 1723 my ($vet) = @_; 1724 my ($res, $coded); 1725 1726 $res = ''; 1727 while ($vet =~ /([^[:cntrl:]]*)([[:cntrl:]]|$)/g) { 1728 $res .= $1; 1729 if ($2 ne '') { 1730 $coded = sprintf("^%c", unpack('C', $2) + 64); 1731 $res .= $coded; 1732 } 1733 } 1734 $res =~ s/$/\$/; 1735 1736 return $res; 1737} 1738 1739my $av_preprocessor = 0; 1740my $av_pending; 1741my @av_paren_type; 1742my $av_pend_colon; 1743 1744sub annotate_reset { 1745 $av_preprocessor = 0; 1746 $av_pending = '_'; 1747 @av_paren_type = ('E'); 1748 $av_pend_colon = 'O'; 1749} 1750 1751sub annotate_values { 1752 my ($stream, $type) = @_; 1753 1754 my $res; 1755 my $var = '_' x length($stream); 1756 my $cur = $stream; 1757 1758 print "$stream\n" if ($dbg_values > 1); 1759 1760 while (length($cur)) { 1761 @av_paren_type = ('E') if ($#av_paren_type < 0); 1762 print " <" . join('', @av_paren_type) . 1763 "> <$type> <$av_pending>" if ($dbg_values > 1); 1764 if ($cur =~ /^(\s+)/o) { 1765 print "WS($1)\n" if ($dbg_values > 1); 1766 if ($1 =~ /\n/ && $av_preprocessor) { 1767 $type = pop(@av_paren_type); 1768 $av_preprocessor = 0; 1769 } 1770 1771 } elsif ($cur =~ /^(\(\s*$Type\s*)\)/ && $av_pending eq '_') { 1772 print "CAST($1)\n" if ($dbg_values > 1); 1773 push(@av_paren_type, $type); 1774 $type = 'c'; 1775 1776 } elsif ($cur =~ /^($Type)\s*(?:$Ident|,|\)|\(|\s*$)/) { 1777 print "DECLARE($1)\n" if ($dbg_values > 1); 1778 $type = 'T'; 1779 1780 } elsif ($cur =~ /^($Modifier)\s*/) { 1781 print "MODIFIER($1)\n" if ($dbg_values > 1); 1782 $type = 'T'; 1783 1784 } elsif ($cur =~ /^(\#\s*define\s*$Ident)(\(?)/o) { 1785 print "DEFINE($1,$2)\n" if ($dbg_values > 1); 1786 $av_preprocessor = 1; 1787 push(@av_paren_type, $type); 1788 if ($2 ne '') { 1789 $av_pending = 'N'; 1790 } 1791 $type = 'E'; 1792 1793 } elsif ($cur =~ /^(\#\s*(?:undef\s*$Ident|include\b))/o) { 1794 print "UNDEF($1)\n" if ($dbg_values > 1); 1795 $av_preprocessor = 1; 1796 push(@av_paren_type, $type); 1797 1798 } elsif ($cur =~ /^(\#\s*(?:ifdef|ifndef|if))/o) { 1799 print "PRE_START($1)\n" if ($dbg_values > 1); 1800 $av_preprocessor = 1; 1801 1802 push(@av_paren_type, $type); 1803 push(@av_paren_type, $type); 1804 $type = 'E'; 1805 1806 } elsif ($cur =~ /^(\#\s*(?:else|elif))/o) { 1807 print "PRE_RESTART($1)\n" if ($dbg_values > 1); 1808 $av_preprocessor = 1; 1809 1810 push(@av_paren_type, $av_paren_type[$#av_paren_type]); 1811 1812 $type = 'E'; 1813 1814 } elsif ($cur =~ /^(\#\s*(?:endif))/o) { 1815 print "PRE_END($1)\n" if ($dbg_values > 1); 1816 1817 $av_preprocessor = 1; 1818 1819 # Assume all arms of the conditional end as this 1820 # one does, and continue as if the #endif was not here. 1821 pop(@av_paren_type); 1822 push(@av_paren_type, $type); 1823 $type = 'E'; 1824 1825 } elsif ($cur =~ /^(\\\n)/o) { 1826 print "PRECONT($1)\n" if ($dbg_values > 1); 1827 1828 } elsif ($cur =~ /^(__attribute__)\s*\(?/o) { 1829 print "ATTR($1)\n" if ($dbg_values > 1); 1830 $av_pending = $type; 1831 $type = 'N'; 1832 1833 } elsif ($cur =~ /^(sizeof)\s*(\()?/o) { 1834 print "SIZEOF($1)\n" if ($dbg_values > 1); 1835 if (defined $2) { 1836 $av_pending = 'V'; 1837 } 1838 $type = 'N'; 1839 1840 } elsif ($cur =~ /^(if|while|for)\b/o) { 1841 print "COND($1)\n" if ($dbg_values > 1); 1842 $av_pending = 'E'; 1843 $type = 'N'; 1844 1845 } elsif ($cur =~/^(case)/o) { 1846 print "CASE($1)\n" if ($dbg_values > 1); 1847 $av_pend_colon = 'C'; 1848 $type = 'N'; 1849 1850 } elsif ($cur =~/^(return|else|goto|typeof|__typeof__)\b/o) { 1851 print "KEYWORD($1)\n" if ($dbg_values > 1); 1852 $type = 'N'; 1853 1854 } elsif ($cur =~ /^(\()/o) { 1855 print "PAREN('$1')\n" if ($dbg_values > 1); 1856 push(@av_paren_type, $av_pending); 1857 $av_pending = '_'; 1858 $type = 'N'; 1859 1860 } elsif ($cur =~ /^(\))/o) { 1861 my $new_type = pop(@av_paren_type); 1862 if ($new_type ne '_') { 1863 $type = $new_type; 1864 print "PAREN('$1') -> $type\n" 1865 if ($dbg_values > 1); 1866 } else { 1867 print "PAREN('$1')\n" if ($dbg_values > 1); 1868 } 1869 1870 } elsif ($cur =~ /^($Ident)\s*\(/o) { 1871 print "FUNC($1)\n" if ($dbg_values > 1); 1872 $type = 'V'; 1873 $av_pending = 'V'; 1874 1875 } elsif ($cur =~ /^($Ident\s*):(?:\s*\d+\s*(,|=|;))?/) { 1876 if (defined $2 && $type eq 'C' || $type eq 'T') { 1877 $av_pend_colon = 'B'; 1878 } elsif ($type eq 'E') { 1879 $av_pend_colon = 'L'; 1880 } 1881 print "IDENT_COLON($1,$type>$av_pend_colon)\n" if ($dbg_values > 1); 1882 $type = 'V'; 1883 1884 } elsif ($cur =~ /^($Ident|$Constant)/o) { 1885 print "IDENT($1)\n" if ($dbg_values > 1); 1886 $type = 'V'; 1887 1888 } elsif ($cur =~ /^($Assignment)/o) { 1889 print "ASSIGN($1)\n" if ($dbg_values > 1); 1890 $type = 'N'; 1891 1892 } elsif ($cur =~/^(;|{|})/) { 1893 print "END($1)\n" if ($dbg_values > 1); 1894 $type = 'E'; 1895 $av_pend_colon = 'O'; 1896 1897 } elsif ($cur =~/^(,)/) { 1898 print "COMMA($1)\n" if ($dbg_values > 1); 1899 $type = 'C'; 1900 1901 } elsif ($cur =~ /^(\?)/o) { 1902 print "QUESTION($1)\n" if ($dbg_values > 1); 1903 $type = 'N'; 1904 1905 } elsif ($cur =~ /^(:)/o) { 1906 print "COLON($1,$av_pend_colon)\n" if ($dbg_values > 1); 1907 1908 substr($var, length($res), 1, $av_pend_colon); 1909 if ($av_pend_colon eq 'C' || $av_pend_colon eq 'L') { 1910 $type = 'E'; 1911 } else { 1912 $type = 'N'; 1913 } 1914 $av_pend_colon = 'O'; 1915 1916 } elsif ($cur =~ /^(\[)/o) { 1917 print "CLOSE($1)\n" if ($dbg_values > 1); 1918 $type = 'N'; 1919 1920 } elsif ($cur =~ /^(-(?![->])|\+(?!\+)|\*|\&\&|\&)/o) { 1921 my $variant; 1922 1923 print "OPV($1)\n" if ($dbg_values > 1); 1924 if ($type eq 'V') { 1925 $variant = 'B'; 1926 } else { 1927 $variant = 'U'; 1928 } 1929 1930 substr($var, length($res), 1, $variant); 1931 $type = 'N'; 1932 1933 } elsif ($cur =~ /^($Operators)/o) { 1934 print "OP($1)\n" if ($dbg_values > 1); 1935 if ($1 ne '++' && $1 ne '--') { 1936 $type = 'N'; 1937 } 1938 1939 } elsif ($cur =~ /(^.)/o) { 1940 print "C($1)\n" if ($dbg_values > 1); 1941 } 1942 if (defined $1) { 1943 $cur = substr($cur, length($1)); 1944 $res .= $type x length($1); 1945 } 1946 } 1947 1948 return ($res, $var); 1949} 1950 1951sub possible { 1952 my ($possible, $line) = @_; 1953 my $notPermitted = qr{(?: 1954 ^(?: 1955 $Modifier| 1956 $Storage| 1957 $Type| 1958 DEFINE_\S+ 1959 )$| 1960 ^(?: 1961 goto| 1962 return| 1963 case| 1964 else| 1965 asm|__asm__| 1966 do| 1967 \#| 1968 \#\#| 1969 )(?:\s|$)| 1970 ^(?:typedef|struct|enum)\b 1971 )}x; 1972 warn "CHECK<$possible> ($line)\n" if ($dbg_possible > 2); 1973 if ($possible !~ $notPermitted) { 1974 # Check for modifiers. 1975 $possible =~ s/\s*$Storage\s*//g; 1976 $possible =~ s/\s*$Sparse\s*//g; 1977 if ($possible =~ /^\s*$/) { 1978 1979 } elsif ($possible =~ /\s/) { 1980 $possible =~ s/\s*$Type\s*//g; 1981 for my $modifier (split(' ', $possible)) { 1982 if ($modifier !~ $notPermitted) { 1983 warn "MODIFIER: $modifier ($possible) ($line)\n" if ($dbg_possible); 1984 push(@modifierListFile, $modifier); 1985 } 1986 } 1987 1988 } else { 1989 warn "POSSIBLE: $possible ($line)\n" if ($dbg_possible); 1990 push(@typeListFile, $possible); 1991 } 1992 build_types(); 1993 } else { 1994 warn "NOTPOSS: $possible ($line)\n" if ($dbg_possible > 1); 1995 } 1996} 1997 1998my $prefix = ''; 1999 2000sub show_type { 2001 my ($type) = @_; 2002 2003 $type =~ tr/[a-z]/[A-Z]/; 2004 2005 return defined $use_type{$type} if (scalar keys %use_type > 0); 2006 2007 return !defined $ignore_type{$type}; 2008} 2009 2010sub report { 2011 my ($level, $type, $msg) = @_; 2012 2013 if (!show_type($type) || 2014 (defined $tst_only && $msg !~ /\Q$tst_only\E/)) { 2015 return 0; 2016 } 2017 my $output = ''; 2018 if ($color) { 2019 if ($level eq 'ERROR') { 2020 $output .= RED; 2021 } elsif ($level eq 'WARNING') { 2022 $output .= YELLOW; 2023 } else { 2024 $output .= GREEN; 2025 } 2026 } 2027 $output .= $prefix . $level . ':'; 2028 if ($show_types) { 2029 $output .= BLUE if ($color); 2030 $output .= "$type:"; 2031 } 2032 $output .= RESET if ($color); 2033 $output .= ' ' . $msg . "\n"; 2034 2035 if ($showfile) { 2036 my @lines = split("\n", $output, -1); 2037 splice(@lines, 1, 1); 2038 $output = join("\n", @lines); 2039 } 2040 $output = (split('\n', $output))[0] . "\n" if ($terse); 2041 2042 push(our @report, $output); 2043 2044 return 1; 2045} 2046 2047sub report_dump { 2048 our @report; 2049} 2050 2051sub fixup_current_range { 2052 my ($lineRef, $offset, $length) = @_; 2053 2054 if ($$lineRef =~ /^\@\@ -\d+,\d+ \+(\d+),(\d+) \@\@/) { 2055 my $o = $1; 2056 my $l = $2; 2057 my $no = $o + $offset; 2058 my $nl = $l + $length; 2059 $$lineRef =~ s/\+$o,$l \@\@/\+$no,$nl \@\@/; 2060 } 2061} 2062 2063sub fix_inserted_deleted_lines { 2064 my ($linesRef, $insertedRef, $deletedRef) = @_; 2065 2066 my $range_last_linenr = 0; 2067 my $delta_offset = 0; 2068 2069 my $old_linenr = 0; 2070 my $new_linenr = 0; 2071 2072 my $next_insert = 0; 2073 my $next_delete = 0; 2074 2075 my @lines = (); 2076 2077 my $inserted = @{$insertedRef}[$next_insert++]; 2078 my $deleted = @{$deletedRef}[$next_delete++]; 2079 2080 foreach my $old_line (@{$linesRef}) { 2081 my $save_line = 1; 2082 my $line = $old_line; #don't modify the array 2083 if ($line =~ /^(?:\+\+\+|\-\-\-)\s+\S+/) { #new filename 2084 $delta_offset = 0; 2085 } elsif ($line =~ /^\@\@ -\d+,\d+ \+\d+,\d+ \@\@/) { #new hunk 2086 $range_last_linenr = $new_linenr; 2087 fixup_current_range(\$line, $delta_offset, 0); 2088 } 2089 2090 while (defined($deleted) && ${$deleted}{'LINENR'} == $old_linenr) { 2091 $deleted = @{$deletedRef}[$next_delete++]; 2092 $save_line = 0; 2093 fixup_current_range(\$lines[$range_last_linenr], $delta_offset--, -1); 2094 } 2095 2096 while (defined($inserted) && ${$inserted}{'LINENR'} == $old_linenr) { 2097 push(@lines, ${$inserted}{'LINE'}); 2098 $inserted = @{$insertedRef}[$next_insert++]; 2099 $new_linenr++; 2100 fixup_current_range(\$lines[$range_last_linenr], $delta_offset++, 1); 2101 } 2102 2103 if ($save_line) { 2104 push(@lines, $line); 2105 $new_linenr++; 2106 } 2107 2108 $old_linenr++; 2109 } 2110 2111 return @lines; 2112} 2113 2114sub fix_insert_line { 2115 my ($linenr, $line) = @_; 2116 2117 my $inserted = { 2118 LINENR => $linenr, 2119 LINE => $line, 2120 }; 2121 push(@fixed_inserted, $inserted); 2122} 2123 2124sub fix_delete_line { 2125 my ($linenr, $line) = @_; 2126 2127 my $deleted = { 2128 LINENR => $linenr, 2129 LINE => $line, 2130 }; 2131 2132 push(@fixed_deleted, $deleted); 2133} 2134 2135sub ERROR { 2136 my ($type, $msg) = @_; 2137 2138 if (report("ERROR", $type, $msg)) { 2139 our $clean = 0; 2140 our $cnt_error++; 2141 return 1; 2142 } 2143 return 0; 2144} 2145sub WARN { 2146 my ($type, $msg) = @_; 2147 2148 if (report("WARNING", $type, $msg)) { 2149 our $clean = 0; 2150 our $cnt_warn++; 2151 return 1; 2152 } 2153 return 0; 2154} 2155sub CHK { 2156 my ($type, $msg) = @_; 2157 2158 if ($check && report("CHECK", $type, $msg)) { 2159 our $clean = 0; 2160 our $cnt_chk++; 2161 return 1; 2162 } 2163 return 0; 2164} 2165 2166sub check_absolute_file { 2167 my ($absolute, $herecurr) = @_; 2168 my $file = $absolute; 2169 2170 ##print "absolute<$absolute>\n"; 2171 2172 # See if any suffix of this path is a path within the tree. 2173 while ($file =~ s@^[^/]*/@@) { 2174 if (-f "$root/$file") { 2175 ##print "file<$file>\n"; 2176 last; 2177 } 2178 } 2179 if (! -f _) { 2180 return 0; 2181 } 2182 2183 # It is, so see if the prefix is acceptable. 2184 my $prefix = $absolute; 2185 substr($prefix, -length($file)) = ''; 2186 2187 ##print "prefix<$prefix>\n"; 2188 if ($prefix ne ".../") { 2189 WARN("USE_RELATIVE_PATH", 2190 "use relative pathname instead of absolute in changelog text\n" . $herecurr); 2191 } 2192} 2193 2194sub trim { 2195 my ($string) = @_; 2196 2197 $string =~ s/^\s+|\s+$//g; 2198 2199 return $string; 2200} 2201 2202sub ltrim { 2203 my ($string) = @_; 2204 2205 $string =~ s/^\s+//; 2206 2207 return $string; 2208} 2209 2210sub rtrim { 2211 my ($string) = @_; 2212 2213 $string =~ s/\s+$//; 2214 2215 return $string; 2216} 2217 2218sub string_find_replace { 2219 my ($string, $find, $replace) = @_; 2220 2221 $string =~ s/$find/$replace/g; 2222 2223 return $string; 2224} 2225 2226sub tabify { 2227 my ($leading) = @_; 2228 2229 my $source_indent = 8; 2230 my $max_spaces_before_tab = $source_indent - 1; 2231 my $spaces_to_tab = " " x $source_indent; 2232 2233 #convert leading spaces to tabs 2234 1 while $leading =~ s@^([\t]*)$spaces_to_tab@$1\t@g; 2235 #Remove spaces before a tab 2236 1 while $leading =~ s@^([\t]*)( {1,$max_spaces_before_tab})\t@$1\t@g; 2237 2238 return "$leading"; 2239} 2240 2241sub pos_last_openparen { 2242 my ($line) = @_; 2243 2244 my $pos = 0; 2245 2246 my $opens = $line =~ tr/\(/\(/; 2247 my $closes = $line =~ tr/\)/\)/; 2248 2249 my $last_openparen = 0; 2250 2251 if (($opens == 0) || ($closes >= $opens)) { 2252 return -1; 2253 } 2254 2255 my $len = length($line); 2256 2257 for ($pos = 0; $pos < $len; $pos++) { 2258 my $string = substr($line, $pos); 2259 if ($string =~ /^($FuncArg|$balanced_parens)/) { 2260 $pos += length($1) - 1; 2261 } elsif (substr($line, $pos, 1) eq '(') { 2262 $last_openparen = $pos; 2263 } elsif (index($string, '(') == -1) { 2264 last; 2265 } 2266 } 2267 2268 return length(expand_tabs(substr($line, 0, $last_openparen))) + 1; 2269} 2270 2271sub process { 2272 my $filename = shift; 2273 2274 my $linenr=0; 2275 my $prevline=""; 2276 my $prevrawline=""; 2277 my $stashline=""; 2278 my $stashrawline=""; 2279 2280 my $length; 2281 my $indent; 2282 my $previndent=0; 2283 my $stashindent=0; 2284 2285 our $clean = 1; 2286 my $signoff = 0; 2287 my $author = ''; 2288 my $authorsignoff = 0; 2289 my $is_patch = 0; 2290 my $is_binding_patch = -1; 2291 my $in_header_lines = $file ? 0 : 1; 2292 my $in_commit_log = 0; #Scanning lines before patch 2293 my $has_commit_log = 0; #Encountered lines before patch 2294 my $commit_log_lines = 0; #Number of commit log lines 2295 my $commit_log_possible_stack_dump = 0; 2296 my $commit_log_long_line = 0; 2297 my $commit_log_has_diff = 0; 2298 my $reported_maintainer_file = 0; 2299 my $non_utf8_charset = 0; 2300 2301 my $last_blank_line = 0; 2302 my $last_coalesced_string_linenr = -1; 2303 2304 our @report = (); 2305 our $cnt_lines = 0; 2306 our $cnt_error = 0; 2307 our $cnt_warn = 0; 2308 our $cnt_chk = 0; 2309 2310 # Trace the real file/line as we go. 2311 my $realfile = ''; 2312 my $realline = 0; 2313 my $realcnt = 0; 2314 my $here = ''; 2315 my $context_function; #undef'd unless there's a known function 2316 my $in_comment = 0; 2317 my $comment_edge = 0; 2318 my $first_line = 0; 2319 my $p1_prefix = ''; 2320 2321 my $prev_values = 'E'; 2322 2323 # suppression flags 2324 my %suppress_ifbraces; 2325 my %suppress_whiletrailers; 2326 my %suppress_export; 2327 my $suppress_statement = 0; 2328 2329 my %signatures = (); 2330 2331 # Pre-scan the patch sanitizing the lines. 2332 # Pre-scan the patch looking for any __setup documentation. 2333 # 2334 my @setup_docs = (); 2335 my $setup_docs = 0; 2336 2337 my $camelcase_file_seeded = 0; 2338 2339 my $checklicenseline = 1; 2340 2341 sanitise_line_reset(); 2342 my $line; 2343 foreach my $rawline (@rawlines) { 2344 $linenr++; 2345 $line = $rawline; 2346 2347 push(@fixed, $rawline) if ($fix); 2348 2349 if ($rawline=~/^\+\+\+\s+(\S+)/) { 2350 $setup_docs = 0; 2351 if ($1 =~ m@Documentation/admin-guide/kernel-parameters.rst$@) { 2352 $setup_docs = 1; 2353 } 2354 #next; 2355 } 2356 if ($rawline =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@/) { 2357 $realline=$1-1; 2358 if (defined $2) { 2359 $realcnt=$3+1; 2360 } else { 2361 $realcnt=1+1; 2362 } 2363 $in_comment = 0; 2364 2365 # Guestimate if this is a continuing comment. Run 2366 # the context looking for a comment "edge". If this 2367 # edge is a close comment then we must be in a comment 2368 # at context start. 2369 my $edge; 2370 my $cnt = $realcnt; 2371 for (my $ln = $linenr + 1; $cnt > 0; $ln++) { 2372 next if (defined $rawlines[$ln - 1] && 2373 $rawlines[$ln - 1] =~ /^-/); 2374 $cnt--; 2375 #print "RAW<$rawlines[$ln - 1]>\n"; 2376 last if (!defined $rawlines[$ln - 1]); 2377 if ($rawlines[$ln - 1] =~ m@(/\*|\*/)@ && 2378 $rawlines[$ln - 1] !~ m@"[^"]*(?:/\*|\*/)[^"]*"@) { 2379 ($edge) = $1; 2380 last; 2381 } 2382 } 2383 if (defined $edge && $edge eq '*/') { 2384 $in_comment = 1; 2385 } 2386 2387 # Guestimate if this is a continuing comment. If this 2388 # is the start of a diff block and this line starts 2389 # ' *' then it is very likely a comment. 2390 if (!defined $edge && 2391 $rawlines[$linenr] =~ m@^.\s*(?:\*\*+| \*)(?:\s|$)@) 2392 { 2393 $in_comment = 1; 2394 } 2395 2396 ##print "COMMENT:$in_comment edge<$edge> $rawline\n"; 2397 sanitise_line_reset($in_comment); 2398 2399 } elsif ($realcnt && $rawline =~ /^(?:\+| |$)/) { 2400 # Standardise the strings and chars within the input to 2401 # simplify matching -- only bother with positive lines. 2402 $line = sanitise_line($rawline); 2403 } 2404 push(@lines, $line); 2405 2406 if ($realcnt > 1) { 2407 $realcnt-- if ($line =~ /^(?:\+| |$)/); 2408 } else { 2409 $realcnt = 0; 2410 } 2411 2412 #print "==>$rawline\n"; 2413 #print "-->$line\n"; 2414 2415 if ($setup_docs && $line =~ /^\+/) { 2416 push(@setup_docs, $line); 2417 } 2418 } 2419 2420 $prefix = ''; 2421 2422 $realcnt = 0; 2423 $linenr = 0; 2424 $fixlinenr = -1; 2425 foreach my $line (@lines) { 2426 $linenr++; 2427 $fixlinenr++; 2428 my $sline = $line; #copy of $line 2429 $sline =~ s/$;/ /g; #with comments as spaces 2430 2431 my $rawline = $rawlines[$linenr - 1]; 2432 2433# check if it's a mode change, rename or start of a patch 2434 if (!$in_commit_log && 2435 ($line =~ /^ mode change [0-7]+ => [0-7]+ \S+\s*$/ || 2436 ($line =~ /^rename (?:from|to) \S+\s*$/ || 2437 $line =~ /^diff --git a\/[\w\/\.\_\-]+ b\/\S+\s*$/))) { 2438 $is_patch = 1; 2439 } 2440 2441#extract the line range in the file after the patch is applied 2442 if (!$in_commit_log && 2443 $line =~ /^\@\@ -\d+(?:,\d+)? \+(\d+)(,(\d+))? \@\@(.*)/) { 2444 my $context = $4; 2445 $is_patch = 1; 2446 $first_line = $linenr + 1; 2447 $realline=$1-1; 2448 if (defined $2) { 2449 $realcnt=$3+1; 2450 } else { 2451 $realcnt=1+1; 2452 } 2453 annotate_reset(); 2454 $prev_values = 'E'; 2455 2456 %suppress_ifbraces = (); 2457 %suppress_whiletrailers = (); 2458 %suppress_export = (); 2459 $suppress_statement = 0; 2460 if ($context =~ /\b(\w+)\s*\(/) { 2461 $context_function = $1; 2462 } else { 2463 undef $context_function; 2464 } 2465 next; 2466 2467# track the line number as we move through the hunk, note that 2468# new versions of GNU diff omit the leading space on completely 2469# blank context lines so we need to count that too. 2470 } elsif ($line =~ /^( |\+|$)/) { 2471 $realline++; 2472 $realcnt-- if ($realcnt != 0); 2473 2474 # Measure the line length and indent. 2475 ($length, $indent) = line_stats($rawline); 2476 2477 # Track the previous line. 2478 ($prevline, $stashline) = ($stashline, $line); 2479 ($previndent, $stashindent) = ($stashindent, $indent); 2480 ($prevrawline, $stashrawline) = ($stashrawline, $rawline); 2481 2482 #warn "line<$line>\n"; 2483 2484 } elsif ($realcnt == 1) { 2485 $realcnt--; 2486 } 2487 2488 my $hunk_line = ($realcnt != 0); 2489 2490 $here = "#$linenr: " if (!$file); 2491 $here = "#$realline: " if ($file); 2492 2493 my $found_file = 0; 2494 # extract the filename as it passes 2495 if ($line =~ /^diff --git.*?(\S+)$/) { 2496 $realfile = $1; 2497 $realfile =~ s@^([^/]*)/@@ if (!$file); 2498 $in_commit_log = 0; 2499 $found_file = 1; 2500 } elsif ($line =~ /^\+\+\+\s+(\S+)/) { 2501 $realfile = $1; 2502 $realfile =~ s@^([^/]*)/@@ if (!$file); 2503 $in_commit_log = 0; 2504 2505 $p1_prefix = $1; 2506 if (!$file && $tree && $p1_prefix ne '' && 2507 -e "$root/$p1_prefix") { 2508 WARN("PATCH_PREFIX", 2509 "patch prefix '$p1_prefix' exists, appears to be a -p0 patch\n"); 2510 } 2511 2512 if ($realfile =~ m@^include/asm/@) { 2513 ERROR("MODIFIED_INCLUDE_ASM", 2514 "do not modify files in include/asm, change architecture specific files in include/asm-<architecture>\n" . "$here$rawline\n"); 2515 } 2516 $found_file = 1; 2517 } 2518 2519#make up the handle for any error we report on this line 2520 if ($showfile) { 2521 $prefix = "$realfile:$realline: " 2522 } elsif ($emacs) { 2523 if ($file) { 2524 $prefix = "$filename:$realline: "; 2525 } else { 2526 $prefix = "$filename:$linenr: "; 2527 } 2528 } 2529 2530 if ($found_file) { 2531 if (is_maintained_obsolete($realfile)) { 2532 WARN("OBSOLETE", 2533 "$realfile is marked as 'obsolete' in the MAINTAINERS hierarchy. No unnecessary modifications please.\n"); 2534 } 2535 if ($realfile =~ m@^(?:drivers/net/|net/|drivers/staging/)@) { 2536 $check = 1; 2537 } else { 2538 $check = $check_orig; 2539 } 2540 $checklicenseline = 1; 2541 2542 if ($realfile !~ /^MAINTAINERS/) { 2543 my $last_binding_patch = $is_binding_patch; 2544 2545 $is_binding_patch = () = $realfile =~ m@^(?:Documentation/devicetree/|include/dt-bindings/)@; 2546 2547 if (($last_binding_patch != -1) && 2548 ($last_binding_patch ^ $is_binding_patch)) { 2549 WARN("DT_SPLIT_BINDING_PATCH", 2550 "DT binding docs and includes should be a separate patch. See: Documentation/devicetree/bindings/submitting-patches.txt\n"); 2551 } 2552 } 2553 2554 next; 2555 } 2556 2557 $here .= "FILE: $realfile:$realline:" if ($realcnt != 0); 2558 2559 my $hereline = "$here\n$rawline\n"; 2560 my $herecurr = "$here\n$rawline\n"; 2561 my $hereprev = "$here\n$prevrawline\n$rawline\n"; 2562 2563 $cnt_lines++ if ($realcnt != 0); 2564 2565# Verify the existence of a commit log if appropriate 2566# 2 is used because a $signature is counted in $commit_log_lines 2567 if ($in_commit_log) { 2568 if ($line !~ /^\s*$/) { 2569 $commit_log_lines++; #could be a $signature 2570 } 2571 } elsif ($has_commit_log && $commit_log_lines < 2) { 2572 WARN("COMMIT_MESSAGE", 2573 "Missing commit description - Add an appropriate one\n"); 2574 $commit_log_lines = 2; #warn only once 2575 } 2576 2577# Check if the commit log has what seems like a diff which can confuse patch 2578 if ($in_commit_log && !$commit_log_has_diff && 2579 (($line =~ m@^\s+diff\b.*a/[\w/]+@ && 2580 $line =~ m@^\s+diff\b.*a/([\w/]+)\s+b/$1\b@) || 2581 $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ || 2582 $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) { 2583 ERROR("DIFF_IN_COMMIT_MSG", 2584 "Avoid using diff content in the commit message - patch(1) might not work\n" . $herecurr); 2585 $commit_log_has_diff = 1; 2586 } 2587 2588# Check for incorrect file permissions 2589 if ($line =~ /^new (file )?mode.*[7531]\d{0,2}$/) { 2590 my $permhere = $here . "FILE: $realfile\n"; 2591 if ($realfile !~ m@scripts/@ && 2592 $realfile !~ /\.(py|pl|awk|sh)$/) { 2593 ERROR("EXECUTE_PERMISSIONS", 2594 "do not set execute permissions for source files\n" . $permhere); 2595 } 2596 } 2597 2598# Check the patch for a From: 2599 if (decode("MIME-Header", $line) =~ /^From:\s*(.*)/) { 2600 $author = $1; 2601 $author = encode("utf8", $author) if ($line =~ /=\?utf-8\?/i); 2602 $author =~ s/"//g; 2603 } 2604 2605# Check the patch for a signoff: 2606 if ($line =~ /^\s*signed-off-by:/i) { 2607 $signoff++; 2608 $in_commit_log = 0; 2609 if ($author ne '') { 2610 my $l = $line; 2611 $l =~ s/"//g; 2612 if ($l =~ /^\s*signed-off-by:\s*\Q$author\E/i) { 2613 $authorsignoff = 1; 2614 } 2615 } 2616 } 2617 2618# Check if MAINTAINERS is being updated. If so, there's probably no need to 2619# emit the "does MAINTAINERS need updating?" message on file add/move/delete 2620 if ($line =~ /^\s*MAINTAINERS\s*\|/) { 2621 $reported_maintainer_file = 1; 2622 } 2623 2624# Check signature styles 2625 if (!$in_header_lines && 2626 $line =~ /^(\s*)([a-z0-9_-]+by:|$signature_tags)(\s*)(.*)/i) { 2627 my $space_before = $1; 2628 my $sign_off = $2; 2629 my $space_after = $3; 2630 my $email = $4; 2631 my $ucfirst_sign_off = ucfirst(lc($sign_off)); 2632 2633 if ($sign_off !~ /$signature_tags/) { 2634 WARN("BAD_SIGN_OFF", 2635 "Non-standard signature: $sign_off\n" . $herecurr); 2636 } 2637 if (defined $space_before && $space_before ne "") { 2638 if (WARN("BAD_SIGN_OFF", 2639 "Do not use whitespace before $ucfirst_sign_off\n" . $herecurr) && 2640 $fix) { 2641 $fixed[$fixlinenr] = 2642 "$ucfirst_sign_off $email"; 2643 } 2644 } 2645 if ($sign_off =~ /-by:$/i && $sign_off ne $ucfirst_sign_off) { 2646 if (WARN("BAD_SIGN_OFF", 2647 "'$ucfirst_sign_off' is the preferred signature form\n" . $herecurr) && 2648 $fix) { 2649 $fixed[$fixlinenr] = 2650 "$ucfirst_sign_off $email"; 2651 } 2652 2653 } 2654 if (!defined $space_after || $space_after ne " ") { 2655 if (WARN("BAD_SIGN_OFF", 2656 "Use a single space after $ucfirst_sign_off\n" . $herecurr) && 2657 $fix) { 2658 $fixed[$fixlinenr] = 2659 "$ucfirst_sign_off $email"; 2660 } 2661 } 2662 2663 my ($email_name, $email_address, $comment) = parse_email($email); 2664 my $suggested_email = format_email(($email_name, $email_address)); 2665 if ($suggested_email eq "") { 2666 ERROR("BAD_SIGN_OFF", 2667 "Unrecognized email address: '$email'\n" . $herecurr); 2668 } else { 2669 my $dequoted = $suggested_email; 2670 $dequoted =~ s/^"//; 2671 $dequoted =~ s/" </ </; 2672 # Don't force email to have quotes 2673 # Allow just an angle bracketed address 2674 if ("$dequoted$comment" ne $email && 2675 "<$email_address>$comment" ne $email && 2676 "$suggested_email$comment" ne $email) { 2677 WARN("BAD_SIGN_OFF", 2678 "email address '$email' might be better as '$suggested_email$comment'\n" . $herecurr); 2679 } 2680 } 2681 2682# Check for duplicate signatures 2683 my $sig_nospace = $line; 2684 $sig_nospace =~ s/\s//g; 2685 $sig_nospace = lc($sig_nospace); 2686 if (defined $signatures{$sig_nospace}) { 2687 WARN("BAD_SIGN_OFF", 2688 "Duplicate signature\n" . $herecurr); 2689 } else { 2690 $signatures{$sig_nospace} = 1; 2691 } 2692 2693# Check Co-developed-by: immediately followed by Signed-off-by: with same name and email 2694 if ($sign_off =~ /^co-developed-by:$/i) { 2695 if ($email eq $author) { 2696 WARN("BAD_SIGN_OFF", 2697 "Co-developed-by: should not be used to attribute nominal patch author '$author'\n" . "$here\n" . $rawline); 2698 } 2699 if (!defined $lines[$linenr]) { 2700 WARN("BAD_SIGN_OFF", 2701 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline); 2702 } elsif ($rawlines[$linenr] !~ /^\s*signed-off-by:\s*(.*)/i) { 2703 WARN("BAD_SIGN_OFF", 2704 "Co-developed-by: must be immediately followed by Signed-off-by:\n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]); 2705 } elsif ($1 ne $email) { 2706 WARN("BAD_SIGN_OFF", 2707 "Co-developed-by and Signed-off-by: name/email do not match \n" . "$here\n" . $rawline . "\n" .$rawlines[$linenr]); 2708 } 2709 } 2710 } 2711 2712# Check email subject for common tools that don't need to be mentioned 2713 if ($in_header_lines && 2714 $line =~ /^Subject:.*\b(?:checkpatch|sparse|smatch)\b[^:]/i) { 2715 WARN("EMAIL_SUBJECT", 2716 "A patch subject line should describe the change not the tool that found it\n" . $herecurr); 2717 } 2718 2719# Check for unwanted Gerrit info 2720 if ($in_commit_log && $line =~ /^\s*change-id:/i) { 2721 ERROR("GERRIT_CHANGE_ID", 2722 "Remove Gerrit Change-Id's before submitting upstream.\n" . $herecurr); 2723 } 2724 2725# Check if the commit log is in a possible stack dump 2726 if ($in_commit_log && !$commit_log_possible_stack_dump && 2727 ($line =~ /^\s*(?:WARNING:|BUG:)/ || 2728 $line =~ /^\s*\[\s*\d+\.\d{6,6}\s*\]/ || 2729 # timestamp 2730 $line =~ /^\s*\[\<[0-9a-fA-F]{8,}\>\]/) || 2731 $line =~ /^(?:\s+\w+:\s+[0-9a-fA-F]+){3,3}/ || 2732 $line =~ /^\s*\#\d+\s*\[[0-9a-fA-F]+\]\s*\w+ at [0-9a-fA-F]+/) { 2733 # stack dump address styles 2734 $commit_log_possible_stack_dump = 1; 2735 } 2736 2737# Check for line lengths > 75 in commit log, warn once 2738 if ($in_commit_log && !$commit_log_long_line && 2739 length($line) > 75 && 2740 !($line =~ /^\s*[a-zA-Z0-9_\/\.]+\s+\|\s+\d+/ || 2741 # file delta changes 2742 $line =~ /^\s*(?:[\w\.\-]+\/)++[\w\.\-]+:/ || 2743 # filename then : 2744 $line =~ /^\s*(?:Fixes:|Link:)/i || 2745 # A Fixes: or Link: line 2746 $commit_log_possible_stack_dump)) { 2747 WARN("COMMIT_LOG_LONG_LINE", 2748 "Possible unwrapped commit description (prefer a maximum 75 chars per line)\n" . $herecurr); 2749 $commit_log_long_line = 1; 2750 } 2751 2752# Reset possible stack dump if a blank line is found 2753 if ($in_commit_log && $commit_log_possible_stack_dump && 2754 $line =~ /^\s*$/) { 2755 $commit_log_possible_stack_dump = 0; 2756 } 2757 2758# Check for git id commit length and improperly formed commit descriptions 2759 if ($in_commit_log && !$commit_log_possible_stack_dump && 2760 $line !~ /^\s*(?:Link|Patchwork|http|https|BugLink):/i && 2761 $line !~ /^This reverts commit [0-9a-f]{7,40}/ && 2762 ($line =~ /\bcommit\s+[0-9a-f]{5,}\b/i || 2763 ($line =~ /(?:\s|^)[0-9a-f]{12,40}(?:[\s"'\(\[]|$)/i && 2764 $line !~ /[\<\[][0-9a-f]{12,40}[\>\]]/i && 2765 $line !~ /\bfixes:\s*[0-9a-f]{12,40}/i))) { 2766 my $init_char = "c"; 2767 my $orig_commit = ""; 2768 my $short = 1; 2769 my $long = 0; 2770 my $case = 1; 2771 my $space = 1; 2772 my $hasdesc = 0; 2773 my $hasparens = 0; 2774 my $id = '0123456789ab'; 2775 my $orig_desc = "commit description"; 2776 my $description = ""; 2777 2778 if ($line =~ /\b(c)ommit\s+([0-9a-f]{5,})\b/i) { 2779 $init_char = $1; 2780 $orig_commit = lc($2); 2781 } elsif ($line =~ /\b([0-9a-f]{12,40})\b/i) { 2782 $orig_commit = lc($1); 2783 } 2784 2785 $short = 0 if ($line =~ /\bcommit\s+[0-9a-f]{12,40}/i); 2786 $long = 1 if ($line =~ /\bcommit\s+[0-9a-f]{41,}/i); 2787 $space = 0 if ($line =~ /\bcommit [0-9a-f]/i); 2788 $case = 0 if ($line =~ /\b[Cc]ommit\s+[0-9a-f]{5,40}[^A-F]/); 2789 if ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)"\)/i) { 2790 $orig_desc = $1; 2791 $hasparens = 1; 2792 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s*$/i && 2793 defined $rawlines[$linenr] && 2794 $rawlines[$linenr] =~ /^\s*\("([^"]+)"\)/) { 2795 $orig_desc = $1; 2796 $hasparens = 1; 2797 } elsif ($line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("[^"]+$/i && 2798 defined $rawlines[$linenr] && 2799 $rawlines[$linenr] =~ /^\s*[^"]+"\)/) { 2800 $line =~ /\bcommit\s+[0-9a-f]{5,}\s+\("([^"]+)$/i; 2801 $orig_desc = $1; 2802 $rawlines[$linenr] =~ /^\s*([^"]+)"\)/; 2803 $orig_desc .= " " . $1; 2804 $hasparens = 1; 2805 } 2806 2807 ($id, $description) = git_commit_info($orig_commit, 2808 $id, $orig_desc); 2809 2810 if (defined($id) && 2811 ($short || $long || $space || $case || ($orig_desc ne $description) || !$hasparens)) { 2812 ERROR("GIT_COMMIT_ID", 2813 "Please use git commit description style 'commit <12+ chars of sha1> (\"<title line>\")' - ie: '${init_char}ommit $id (\"$description\")'\n" . $herecurr); 2814 } 2815 } 2816 2817# Check for added, moved or deleted files 2818 if (!$reported_maintainer_file && !$in_commit_log && 2819 ($line =~ /^(?:new|deleted) file mode\s*\d+\s*$/ || 2820 $line =~ /^rename (?:from|to) [\w\/\.\-]+\s*$/ || 2821 ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/ && 2822 (defined($1) || defined($2))))) { 2823 $is_patch = 1; 2824 $reported_maintainer_file = 1; 2825 WARN("FILE_PATH_CHANGES", 2826 "added, moved or deleted file(s), does MAINTAINERS need updating?\n" . $herecurr); 2827 } 2828 2829# Check for wrappage within a valid hunk of the file 2830 if ($realcnt != 0 && $line !~ m{^(?:\+|-| |\\ No newline|$)}) { 2831 ERROR("CORRUPTED_PATCH", 2832 "patch seems to be corrupt (line wrapped?)\n" . 2833 $herecurr) if (!$emitted_corrupt++); 2834 } 2835 2836# UTF-8 regex found at http://www.w3.org/International/questions/qa-forms-utf-8.en.php 2837 if (($realfile =~ /^$/ || $line =~ /^\+/) && 2838 $rawline !~ m/^$UTF8*$/) { 2839 my ($utf8_prefix) = ($rawline =~ /^($UTF8*)/); 2840 2841 my $blank = copy_spacing($rawline); 2842 my $ptr = substr($blank, 0, length($utf8_prefix)) . "^"; 2843 my $hereptr = "$hereline$ptr\n"; 2844 2845 CHK("INVALID_UTF8", 2846 "Invalid UTF-8, patch and commit message should be encoded in UTF-8\n" . $hereptr); 2847 } 2848 2849# Check if it's the start of a commit log 2850# (not a header line and we haven't seen the patch filename) 2851 if ($in_header_lines && $realfile =~ /^$/ && 2852 !($rawline =~ /^\s+(?:\S|$)/ || 2853 $rawline =~ /^(?:commit\b|from\b|[\w-]+:)/i)) { 2854 $in_header_lines = 0; 2855 $in_commit_log = 1; 2856 $has_commit_log = 1; 2857 } 2858 2859# Check if there is UTF-8 in a commit log when a mail header has explicitly 2860# declined it, i.e defined some charset where it is missing. 2861 if ($in_header_lines && 2862 $rawline =~ /^Content-Type:.+charset="(.+)".*$/ && 2863 $1 !~ /utf-8/i) { 2864 $non_utf8_charset = 1; 2865 } 2866 2867 if ($in_commit_log && $non_utf8_charset && $realfile =~ /^$/ && 2868 $rawline =~ /$NON_ASCII_UTF8/) { 2869 WARN("UTF8_BEFORE_PATCH", 2870 "8-bit UTF-8 used in possible commit log\n" . $herecurr); 2871 } 2872 2873# Check for absolute kernel paths in commit message 2874 if ($tree && $in_commit_log) { 2875 while ($line =~ m{(?:^|\s)(/\S*)}g) { 2876 my $file = $1; 2877 2878 if ($file =~ m{^(.*?)(?::\d+)+:?$} && 2879 check_absolute_file($1, $herecurr)) { 2880 # 2881 } else { 2882 check_absolute_file($file, $herecurr); 2883 } 2884 } 2885 } 2886 2887# Check for various typo / spelling mistakes 2888 if (defined($misspellings) && 2889 ($in_commit_log || $line =~ /^(?:\+|Subject:)/i)) { 2890 while ($rawline =~ /(?:^|[^a-z@])($misspellings)(?:\b|$|[^a-z@])/gi) { 2891 my $typo = $1; 2892 my $typo_fix = $spelling_fix{lc($typo)}; 2893 $typo_fix = ucfirst($typo_fix) if ($typo =~ /^[A-Z]/); 2894 $typo_fix = uc($typo_fix) if ($typo =~ /^[A-Z]+$/); 2895 my $msg_level = \&WARN; 2896 $msg_level = \&CHK if ($file); 2897 if (&{$msg_level}("TYPO_SPELLING", 2898 "'$typo' may be misspelled - perhaps '$typo_fix'?\n" . $herecurr) && 2899 $fix) { 2900 $fixed[$fixlinenr] =~ s/(^|[^A-Za-z@])($typo)($|[^A-Za-z@])/$1$typo_fix$3/; 2901 } 2902 } 2903 } 2904 2905# check for invalid commit id 2906 if ($in_commit_log && $line =~ /(^fixes:|\bcommit)\s+([0-9a-f]{6,40})\b/i) { 2907 my $id; 2908 my $description; 2909 ($id, $description) = git_commit_info($2, undef, undef); 2910 if (!defined($id)) { 2911 WARN("UNKNOWN_COMMIT_ID", 2912 "Unknown commit id '$2', maybe rebased or not pulled?\n" . $herecurr); 2913 } 2914 } 2915 2916# ignore non-hunk lines and lines being removed 2917 next if (!$hunk_line || $line =~ /^-/); 2918 2919#trailing whitespace 2920 if ($line =~ /^\+.*\015/) { 2921 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 2922 if (ERROR("DOS_LINE_ENDINGS", 2923 "DOS line endings\n" . $herevet) && 2924 $fix) { 2925 $fixed[$fixlinenr] =~ s/[\s\015]+$//; 2926 } 2927 } elsif ($rawline =~ /^\+.*\S\s+$/ || $rawline =~ /^\+\s+$/) { 2928 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 2929 if (ERROR("TRAILING_WHITESPACE", 2930 "trailing whitespace\n" . $herevet) && 2931 $fix) { 2932 $fixed[$fixlinenr] =~ s/\s+$//; 2933 } 2934 2935 $rpt_cleaners = 1; 2936 } 2937 2938# Check for FSF mailing addresses. 2939 if ($rawline =~ /\bwrite to the Free/i || 2940 $rawline =~ /\b675\s+Mass\s+Ave/i || 2941 $rawline =~ /\b59\s+Temple\s+Pl/i || 2942 $rawline =~ /\b51\s+Franklin\s+St/i) { 2943 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 2944 my $msg_level = \&ERROR; 2945 $msg_level = \&CHK if ($file); 2946 &{$msg_level}("FSF_MAILING_ADDRESS", 2947 "Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL.\n" . $herevet) 2948 } 2949 2950# check for Kconfig help text having a real description 2951# Only applies when adding the entry originally, after that we do not have 2952# sufficient context to determine whether it is indeed long enough. 2953 if ($realfile =~ /Kconfig/ && 2954 # 'choice' is usually the last thing on the line (though 2955 # Kconfig supports named choices), so use a word boundary 2956 # (\b) rather than a whitespace character (\s) 2957 $line =~ /^\+\s*(?:config|menuconfig|choice)\b/) { 2958 my $length = 0; 2959 my $cnt = $realcnt; 2960 my $ln = $linenr + 1; 2961 my $f; 2962 my $is_start = 0; 2963 my $is_end = 0; 2964 for (; $cnt > 0 && defined $lines[$ln - 1]; $ln++) { 2965 $f = $lines[$ln - 1]; 2966 $cnt-- if ($lines[$ln - 1] !~ /^-/); 2967 $is_end = $lines[$ln - 1] =~ /^\+/; 2968 2969 next if ($f =~ /^-/); 2970 last if (!$file && $f =~ /^\@\@/); 2971 2972 if ($lines[$ln - 1] =~ /^\+\s*(?:bool|tristate|prompt)\s*["']/) { 2973 $is_start = 1; 2974 } elsif ($lines[$ln - 1] =~ /^\+\s*(?:help|---help---)\s*$/) { 2975 if ($lines[$ln - 1] =~ "---help---") { 2976 WARN("CONFIG_DESCRIPTION", 2977 "prefer 'help' over '---help---' for new help texts\n" . $herecurr); 2978 } 2979 $length = -1; 2980 } 2981 2982 $f =~ s/^.//; 2983 $f =~ s/#.*//; 2984 $f =~ s/^\s+//; 2985 next if ($f =~ /^$/); 2986 2987 # This only checks context lines in the patch 2988 # and so hopefully shouldn't trigger false 2989 # positives, even though some of these are 2990 # common words in help texts 2991 if ($f =~ /^\s*(?:config|menuconfig|choice|endchoice| 2992 if|endif|menu|endmenu|source)\b/x) { 2993 $is_end = 1; 2994 last; 2995 } 2996 $length++; 2997 } 2998 if ($is_start && $is_end && $length < $min_conf_desc_length) { 2999 WARN("CONFIG_DESCRIPTION", 3000 "please write a paragraph that describes the config symbol fully\n" . $herecurr); 3001 } 3002 #print "is_start<$is_start> is_end<$is_end> length<$length>\n"; 3003 } 3004 3005# check for MAINTAINERS entries that don't have the right form 3006 if ($realfile =~ /^MAINTAINERS$/ && 3007 $rawline =~ /^\+[A-Z]:/ && 3008 $rawline !~ /^\+[A-Z]:\t\S/) { 3009 if (WARN("MAINTAINERS_STYLE", 3010 "MAINTAINERS entries use one tab after TYPE:\n" . $herecurr) && 3011 $fix) { 3012 $fixed[$fixlinenr] =~ s/^(\+[A-Z]):\s*/$1:\t/; 3013 } 3014 } 3015 3016# discourage the use of boolean for type definition attributes of Kconfig options 3017 if ($realfile =~ /Kconfig/ && 3018 $line =~ /^\+\s*\bboolean\b/) { 3019 WARN("CONFIG_TYPE_BOOLEAN", 3020 "Use of boolean is deprecated, please use bool instead.\n" . $herecurr); 3021 } 3022 3023 if (($realfile =~ /Makefile.*/ || $realfile =~ /Kbuild.*/) && 3024 ($line =~ /\+(EXTRA_[A-Z]+FLAGS).*/)) { 3025 my $flag = $1; 3026 my $replacement = { 3027 'EXTRA_AFLAGS' => 'asflags-y', 3028 'EXTRA_CFLAGS' => 'ccflags-y', 3029 'EXTRA_CPPFLAGS' => 'cppflags-y', 3030 'EXTRA_LDFLAGS' => 'ldflags-y', 3031 }; 3032 3033 WARN("DEPRECATED_VARIABLE", 3034 "Use of $flag is deprecated, please use \`$replacement->{$flag} instead.\n" . $herecurr) if ($replacement->{$flag}); 3035 } 3036 3037# check for DT compatible documentation 3038 if (defined $root && 3039 (($realfile =~ /\.dtsi?$/ && $line =~ /^\+\s*compatible\s*=\s*\"/) || 3040 ($realfile =~ /\.[ch]$/ && $line =~ /^\+.*\.compatible\s*=\s*\"/))) { 3041 3042 my @compats = $rawline =~ /\"([a-zA-Z0-9\-\,\.\+_]+)\"/g; 3043 3044 my $dt_path = $root . "/Documentation/devicetree/bindings/"; 3045 my $vp_file = $dt_path . "vendor-prefixes.yaml"; 3046 3047 foreach my $compat (@compats) { 3048 my $compat2 = $compat; 3049 $compat2 =~ s/\,[a-zA-Z0-9]*\-/\,<\.\*>\-/; 3050 my $compat3 = $compat; 3051 $compat3 =~ s/\,([a-z]*)[0-9]*\-/\,$1<\.\*>\-/; 3052 `grep -Erq "$compat|$compat2|$compat3" $dt_path`; 3053 if ( $? >> 8 ) { 3054 WARN("UNDOCUMENTED_DT_STRING", 3055 "DT compatible string \"$compat\" appears un-documented -- check $dt_path\n" . $herecurr); 3056 } 3057 3058 next if $compat !~ /^([a-zA-Z0-9\-]+)\,/; 3059 my $vendor = $1; 3060 `grep -Eq "\\"\\^\Q$vendor\E,\\.\\*\\":" $vp_file`; 3061 if ( $? >> 8 ) { 3062 WARN("UNDOCUMENTED_DT_STRING", 3063 "DT compatible string vendor \"$vendor\" appears un-documented -- check $vp_file\n" . $herecurr); 3064 } 3065 } 3066 } 3067 3068# check for using SPDX license tag at beginning of files 3069 if ($realline == $checklicenseline) { 3070 if ($rawline =~ /^[ \+]\s*\#\!\s*\//) { 3071 $checklicenseline = 2; 3072 } elsif ($rawline =~ /^\+/) { 3073 my $comment = ""; 3074 if ($realfile =~ /\.(h|s|S)$/) { 3075 $comment = '/*'; 3076 } elsif ($realfile =~ /\.(c|dts|dtsi)$/) { 3077 $comment = '//'; 3078 } elsif (($checklicenseline == 2) || $realfile =~ /\.(sh|pl|py|awk|tc)$/) { 3079 $comment = '#'; 3080 } elsif ($realfile =~ /\.rst$/) { 3081 $comment = '..'; 3082 } 3083 3084# check SPDX comment style for .[chsS] files 3085 if ($realfile =~ /\.[chsS]$/ && 3086 $rawline =~ /SPDX-License-Identifier:/ && 3087 $rawline !~ m@^\+\s*\Q$comment\E\s*@) { 3088 WARN("SPDX_LICENSE_TAG", 3089 "Improper SPDX comment style for '$realfile', please use '$comment' instead\n" . $herecurr); 3090 } 3091 3092 if ($comment !~ /^$/ && 3093 $rawline !~ m@^\+\Q$comment\E SPDX-License-Identifier: @) { 3094 WARN("SPDX_LICENSE_TAG", 3095 "Missing or malformed SPDX-License-Identifier tag in line $checklicenseline\n" . $herecurr); 3096 } elsif ($rawline =~ /(SPDX-License-Identifier: .*)/) { 3097 my $spdx_license = $1; 3098 if (!is_SPDX_License_valid($spdx_license)) { 3099 WARN("SPDX_LICENSE_TAG", 3100 "'$spdx_license' is not supported in LICENSES/...\n" . $herecurr); 3101 } 3102 } 3103 } 3104 } 3105 3106# check we are in a valid source file if not then ignore this hunk 3107 next if ($realfile !~ /\.(h|c|s|S|sh|dtsi|dts)$/); 3108 3109# check for using SPDX-License-Identifier on the wrong line number 3110 if ($realline != $checklicenseline && 3111 $rawline =~ /\bSPDX-License-Identifier:/ && 3112 substr($line, @-, @+ - @-) eq "$;" x (@+ - @-)) { 3113 WARN("SPDX_LICENSE_TAG", 3114 "Misplaced SPDX-License-Identifier tag - use line $checklicenseline instead\n" . $herecurr); 3115 } 3116 3117# line length limit (with some exclusions) 3118# 3119# There are a few types of lines that may extend beyond $max_line_length: 3120# logging functions like pr_info that end in a string 3121# lines with a single string 3122# #defines that are a single string 3123# lines with an RFC3986 like URL 3124# 3125# There are 3 different line length message types: 3126# LONG_LINE_COMMENT a comment starts before but extends beyond $max_line_length 3127# LONG_LINE_STRING a string starts before but extends beyond $max_line_length 3128# LONG_LINE all other lines longer than $max_line_length 3129# 3130# if LONG_LINE is ignored, the other 2 types are also ignored 3131# 3132 3133 if ($line =~ /^\+/ && $length > $max_line_length) { 3134 my $msg_type = "LONG_LINE"; 3135 3136 # Check the allowed long line types first 3137 3138 # logging functions that end in a string that starts 3139 # before $max_line_length 3140 if ($line =~ /^\+\s*$logFunctions\s*\(\s*(?:(?:KERN_\S+\s*|[^"]*))?($String\s*(?:|,|\)\s*;)\s*)$/ && 3141 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) { 3142 $msg_type = ""; 3143 3144 # lines with only strings (w/ possible termination) 3145 # #defines with only strings 3146 } elsif ($line =~ /^\+\s*$String\s*(?:\s*|,|\)\s*;)\s*$/ || 3147 $line =~ /^\+\s*#\s*define\s+\w+\s+$String$/) { 3148 $msg_type = ""; 3149 3150 # More special cases 3151 } elsif ($line =~ /^\+.*\bEFI_GUID\s*\(/ || 3152 $line =~ /^\+\s*(?:\w+)?\s*DEFINE_PER_CPU/) { 3153 $msg_type = ""; 3154 3155 # URL ($rawline is used in case the URL is in a comment) 3156 } elsif ($rawline =~ /^\+.*\b[a-z][\w\.\+\-]*:\/\/\S+/i) { 3157 $msg_type = ""; 3158 3159 # Otherwise set the alternate message types 3160 3161 # a comment starts before $max_line_length 3162 } elsif ($line =~ /($;[\s$;]*)$/ && 3163 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) { 3164 $msg_type = "LONG_LINE_COMMENT" 3165 3166 # a quoted string starts before $max_line_length 3167 } elsif ($sline =~ /\s*($String(?:\s*(?:\\|,\s*|\)\s*;\s*))?)$/ && 3168 length(expand_tabs(substr($line, 1, length($line) - length($1) - 1))) <= $max_line_length) { 3169 $msg_type = "LONG_LINE_STRING" 3170 } 3171 3172 if ($msg_type ne "" && 3173 (show_type("LONG_LINE") || show_type($msg_type))) { 3174 WARN($msg_type, 3175 "line over $max_line_length characters\n" . $herecurr); 3176 } 3177 } 3178 3179# check for adding lines without a newline. 3180 if ($line =~ /^\+/ && defined $lines[$linenr] && $lines[$linenr] =~ /^\\ No newline at end of file/) { 3181 WARN("MISSING_EOF_NEWLINE", 3182 "adding a line without newline at end of file\n" . $herecurr); 3183 } 3184 3185# check we are in a valid source file C or perl if not then ignore this hunk 3186 next if ($realfile !~ /\.(h|c|pl|dtsi|dts)$/); 3187 3188# at the beginning of a line any tabs must come first and anything 3189# more than 8 must use tabs. 3190 if ($rawline =~ /^\+\s* \t\s*\S/ || 3191 $rawline =~ /^\+\s* \s*/) { 3192 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 3193 $rpt_cleaners = 1; 3194 if (ERROR("CODE_INDENT", 3195 "code indent should use tabs where possible\n" . $herevet) && 3196 $fix) { 3197 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e; 3198 } 3199 } 3200 3201# check for space before tabs. 3202 if ($rawline =~ /^\+/ && $rawline =~ / \t/) { 3203 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 3204 if (WARN("SPACE_BEFORE_TAB", 3205 "please, no space before tabs\n" . $herevet) && 3206 $fix) { 3207 while ($fixed[$fixlinenr] =~ 3208 s/(^\+.*) {8,8}\t/$1\t\t/) {} 3209 while ($fixed[$fixlinenr] =~ 3210 s/(^\+.*) +\t/$1\t/) {} 3211 } 3212 } 3213 3214# check for assignments on the start of a line 3215 if ($sline =~ /^\+\s+($Assignment)[^=]/) { 3216 CHK("ASSIGNMENT_CONTINUATIONS", 3217 "Assignment operator '$1' should be on the previous line\n" . $hereprev); 3218 } 3219 3220# check for && or || at the start of a line 3221 if ($rawline =~ /^\+\s*(&&|\|\|)/) { 3222 CHK("LOGICAL_CONTINUATIONS", 3223 "Logical continuations should be on the previous line\n" . $hereprev); 3224 } 3225 3226# check indentation starts on a tab stop 3227 if ($perl_version_ok && 3228 $sline =~ /^\+\t+( +)(?:$c90_Keywords\b|\{\s*$|\}\s*(?:else\b|while\b|\s*$)|$Declare\s*$Ident\s*[;=])/) { 3229 my $indent = length($1); 3230 if ($indent % 8) { 3231 if (WARN("TABSTOP", 3232 "Statements should start on a tabstop\n" . $herecurr) && 3233 $fix) { 3234 $fixed[$fixlinenr] =~ s@(^\+\t+) +@$1 . "\t" x ($indent/8)@e; 3235 } 3236 } 3237 } 3238 3239# check multi-line statement indentation matches previous line 3240 if ($perl_version_ok && 3241 $prevline =~ /^\+([ \t]*)((?:$c90_Keywords(?:\s+if)\s*)|(?:$Declare\s*)?(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*|(?:\*\s*)*$Lval\s*=\s*$Ident\s*)\(.*(\&\&|\|\||,)\s*$/) { 3242 $prevline =~ /^\+(\t*)(.*)$/; 3243 my $oldindent = $1; 3244 my $rest = $2; 3245 3246 my $pos = pos_last_openparen($rest); 3247 if ($pos >= 0) { 3248 $line =~ /^(\+| )([ \t]*)/; 3249 my $newindent = $2; 3250 3251 my $goodtabindent = $oldindent . 3252 "\t" x ($pos / 8) . 3253 " " x ($pos % 8); 3254 my $goodspaceindent = $oldindent . " " x $pos; 3255 3256 if ($newindent ne $goodtabindent && 3257 $newindent ne $goodspaceindent) { 3258 3259 if (CHK("PARENTHESIS_ALIGNMENT", 3260 "Alignment should match open parenthesis\n" . $hereprev) && 3261 $fix && $line =~ /^\+/) { 3262 $fixed[$fixlinenr] =~ 3263 s/^\+[ \t]*/\+$goodtabindent/; 3264 } 3265 } 3266 } 3267 } 3268 3269# check for space after cast like "(int) foo" or "(struct foo) bar" 3270# avoid checking a few false positives: 3271# "sizeof(<type>)" or "__alignof__(<type>)" 3272# function pointer declarations like "(*foo)(int) = bar;" 3273# structure definitions like "(struct foo) { 0 };" 3274# multiline macros that define functions 3275# known attributes or the __attribute__ keyword 3276 if ($line =~ /^\+(.*)\(\s*$Type\s*\)([ \t]++)((?![={]|\\$|$Attribute|__attribute__))/ && 3277 (!defined($1) || $1 !~ /\b(?:sizeof|__alignof__)\s*$/)) { 3278 if (CHK("SPACING", 3279 "No space is necessary after a cast\n" . $herecurr) && 3280 $fix) { 3281 $fixed[$fixlinenr] =~ 3282 s/(\(\s*$Type\s*\))[ \t]+/$1/; 3283 } 3284 } 3285 3286# Block comment styles 3287# Networking with an initial /* 3288 if ($realfile =~ m@^(drivers/net/|net/)@ && 3289 $prevrawline =~ /^\+[ \t]*\/\*[ \t]*$/ && 3290 $rawline =~ /^\+[ \t]*\*/ && 3291 $realline > 2) { 3292 WARN("NETWORKING_BLOCK_COMMENT_STYLE", 3293 "networking block comments don't use an empty /* line, use /* Comment...\n" . $hereprev); 3294 } 3295 3296# Block comments use * on subsequent lines 3297 if ($prevline =~ /$;[ \t]*$/ && #ends in comment 3298 $prevrawline =~ /^\+.*?\/\*/ && #starting /* 3299 $prevrawline !~ /\*\/[ \t]*$/ && #no trailing */ 3300 $rawline =~ /^\+/ && #line is new 3301 $rawline !~ /^\+[ \t]*\*/) { #no leading * 3302 WARN("BLOCK_COMMENT_STYLE", 3303 "Block comments use * on subsequent lines\n" . $hereprev); 3304 } 3305 3306# Block comments use */ on trailing lines 3307 if ($rawline !~ m@^\+[ \t]*\*/[ \t]*$@ && #trailing */ 3308 $rawline !~ m@^\+.*/\*.*\*/[ \t]*$@ && #inline /*...*/ 3309 $rawline !~ m@^\+.*\*{2,}/[ \t]*$@ && #trailing **/ 3310 $rawline =~ m@^\+[ \t]*.+\*\/[ \t]*$@) { #non blank */ 3311 WARN("BLOCK_COMMENT_STYLE", 3312 "Block comments use a trailing */ on a separate line\n" . $herecurr); 3313 } 3314 3315# Block comment * alignment 3316 if ($prevline =~ /$;[ \t]*$/ && #ends in comment 3317 $line =~ /^\+[ \t]*$;/ && #leading comment 3318 $rawline =~ /^\+[ \t]*\*/ && #leading * 3319 (($prevrawline =~ /^\+.*?\/\*/ && #leading /* 3320 $prevrawline !~ /\*\/[ \t]*$/) || #no trailing */ 3321 $prevrawline =~ /^\+[ \t]*\*/)) { #leading * 3322 my $oldindent; 3323 $prevrawline =~ m@^\+([ \t]*/?)\*@; 3324 if (defined($1)) { 3325 $oldindent = expand_tabs($1); 3326 } else { 3327 $prevrawline =~ m@^\+(.*/?)\*@; 3328 $oldindent = expand_tabs($1); 3329 } 3330 $rawline =~ m@^\+([ \t]*)\*@; 3331 my $newindent = $1; 3332 $newindent = expand_tabs($newindent); 3333 if (length($oldindent) ne length($newindent)) { 3334 WARN("BLOCK_COMMENT_STYLE", 3335 "Block comments should align the * on each line\n" . $hereprev); 3336 } 3337 } 3338 3339# check for missing blank lines after struct/union declarations 3340# with exceptions for various attributes and macros 3341 if ($prevline =~ /^[\+ ]};?\s*$/ && 3342 $line =~ /^\+/ && 3343 !($line =~ /^\+\s*$/ || 3344 $line =~ /^\+\s*EXPORT_SYMBOL/ || 3345 $line =~ /^\+\s*MODULE_/i || 3346 $line =~ /^\+\s*\#\s*(?:end|elif|else)/ || 3347 $line =~ /^\+[a-z_]*init/ || 3348 $line =~ /^\+\s*(?:static\s+)?[A-Z_]*ATTR/ || 3349 $line =~ /^\+\s*DECLARE/ || 3350 $line =~ /^\+\s*builtin_[\w_]*driver/ || 3351 $line =~ /^\+\s*__setup/)) { 3352 if (CHK("LINE_SPACING", 3353 "Please use a blank line after function/struct/union/enum declarations\n" . $hereprev) && 3354 $fix) { 3355 fix_insert_line($fixlinenr, "\+"); 3356 } 3357 } 3358 3359# check for multiple consecutive blank lines 3360 if ($prevline =~ /^[\+ ]\s*$/ && 3361 $line =~ /^\+\s*$/ && 3362 $last_blank_line != ($linenr - 1)) { 3363 if (CHK("LINE_SPACING", 3364 "Please don't use multiple blank lines\n" . $hereprev) && 3365 $fix) { 3366 fix_delete_line($fixlinenr, $rawline); 3367 } 3368 3369 $last_blank_line = $linenr; 3370 } 3371 3372# check for missing blank lines after declarations 3373 if ($sline =~ /^\+\s+\S/ && #Not at char 1 3374 # actual declarations 3375 ($prevline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ || 3376 # function pointer declarations 3377 $prevline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ || 3378 # foo bar; where foo is some local typedef or #define 3379 $prevline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ || 3380 # known declaration macros 3381 $prevline =~ /^\+\s+$declaration_macros/) && 3382 # for "else if" which can look like "$Ident $Ident" 3383 !($prevline =~ /^\+\s+$c90_Keywords\b/ || 3384 # other possible extensions of declaration lines 3385 $prevline =~ /(?:$Compare|$Assignment|$Operators)\s*$/ || 3386 # not starting a section or a macro "\" extended line 3387 $prevline =~ /(?:\{\s*|\\)$/) && 3388 # looks like a declaration 3389 !($sline =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ || 3390 # function pointer declarations 3391 $sline =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ || 3392 # foo bar; where foo is some local typedef or #define 3393 $sline =~ /^\+\s+$Ident(?:\s+|\s*\*\s*)$Ident\s*[=,;\[]/ || 3394 # known declaration macros 3395 $sline =~ /^\+\s+$declaration_macros/ || 3396 # start of struct or union or enum 3397 $sline =~ /^\+\s+(?:static\s+)?(?:const\s+)?(?:union|struct|enum|typedef)\b/ || 3398 # start or end of block or continuation of declaration 3399 $sline =~ /^\+\s+(?:$|[\{\}\.\#\"\?\:\(\[])/ || 3400 # bitfield continuation 3401 $sline =~ /^\+\s+$Ident\s*:\s*\d+\s*[,;]/ || 3402 # other possible extensions of declaration lines 3403 $sline =~ /^\+\s+\(?\s*(?:$Compare|$Assignment|$Operators)/) && 3404 # indentation of previous and current line are the same 3405 (($prevline =~ /\+(\s+)\S/) && $sline =~ /^\+$1\S/)) { 3406 if (WARN("LINE_SPACING", 3407 "Missing a blank line after declarations\n" . $hereprev) && 3408 $fix) { 3409 fix_insert_line($fixlinenr, "\+"); 3410 } 3411 } 3412 3413# check for spaces at the beginning of a line. 3414# Exceptions: 3415# 1) within comments 3416# 2) indented preprocessor commands 3417# 3) hanging labels 3418 if ($rawline =~ /^\+ / && $line !~ /^\+ *(?:$;|#|$Ident:)/) { 3419 my $herevet = "$here\n" . cat_vet($rawline) . "\n"; 3420 if (WARN("LEADING_SPACE", 3421 "please, no spaces at the start of a line\n" . $herevet) && 3422 $fix) { 3423 $fixed[$fixlinenr] =~ s/^\+([ \t]+)/"\+" . tabify($1)/e; 3424 } 3425 } 3426 3427# check we are in a valid C source file if not then ignore this hunk 3428 next if ($realfile !~ /\.(h|c)$/); 3429 3430# check for unusual line ending [ or ( 3431 if ($line =~ /^\+.*([\[\(])\s*$/) { 3432 CHK("OPEN_ENDED_LINE", 3433 "Lines should not end with a '$1'\n" . $herecurr); 3434 } 3435 3436# check if this appears to be the start function declaration, save the name 3437 if ($sline =~ /^\+\{\s*$/ && 3438 $prevline =~ /^\+(?:(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*)?($Ident)\(/) { 3439 $context_function = $1; 3440 } 3441 3442# check if this appears to be the end of function declaration 3443 if ($sline =~ /^\+\}\s*$/) { 3444 undef $context_function; 3445 } 3446 3447# check indentation of any line with a bare else 3448# (but not if it is a multiple line "if (foo) return bar; else return baz;") 3449# if the previous line is a break or return and is indented 1 tab more... 3450 if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) { 3451 my $tabs = length($1) + 1; 3452 if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ || 3453 ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ && 3454 defined $lines[$linenr] && 3455 $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) { 3456 WARN("UNNECESSARY_ELSE", 3457 "else is not generally useful after a break or return\n" . $hereprev); 3458 } 3459 } 3460 3461# check indentation of a line with a break; 3462# if the previous line is a goto or return and is indented the same # of tabs 3463 if ($sline =~ /^\+([\t]+)break\s*;\s*$/) { 3464 my $tabs = $1; 3465 if ($prevline =~ /^\+$tabs(?:goto|return)\b/) { 3466 WARN("UNNECESSARY_BREAK", 3467 "break is not useful after a goto or return\n" . $hereprev); 3468 } 3469 } 3470 3471# check for RCS/CVS revision markers 3472 if ($rawline =~ /^\+.*\$(Revision|Log|Id)(?:\$|)/) { 3473 WARN("CVS_KEYWORD", 3474 "CVS style keyword markers, these will _not_ be updated\n". $herecurr); 3475 } 3476 3477# check for old HOTPLUG __dev<foo> section markings 3478 if ($line =~ /\b(__dev(init|exit)(data|const|))\b/) { 3479 WARN("HOTPLUG_SECTION", 3480 "Using $1 is unnecessary\n" . $herecurr); 3481 } 3482 3483# Check for potential 'bare' types 3484 my ($stat, $cond, $line_nr_next, $remain_next, $off_next, 3485 $realline_next); 3486#print "LINE<$line>\n"; 3487 if ($linenr > $suppress_statement && 3488 $realcnt && $sline =~ /.\s*\S/) { 3489 ($stat, $cond, $line_nr_next, $remain_next, $off_next) = 3490 ctx_statement_block($linenr, $realcnt, 0); 3491 $stat =~ s/\n./\n /g; 3492 $cond =~ s/\n./\n /g; 3493 3494#print "linenr<$linenr> <$stat>\n"; 3495 # If this statement has no statement boundaries within 3496 # it there is no point in retrying a statement scan 3497 # until we hit end of it. 3498 my $frag = $stat; $frag =~ s/;+\s*$//; 3499 if ($frag !~ /(?:{|;)/) { 3500#print "skip<$line_nr_next>\n"; 3501 $suppress_statement = $line_nr_next; 3502 } 3503 3504 # Find the real next line. 3505 $realline_next = $line_nr_next; 3506 if (defined $realline_next && 3507 (!defined $lines[$realline_next - 1] || 3508 substr($lines[$realline_next - 1], $off_next) =~ /^\s*$/)) { 3509 $realline_next++; 3510 } 3511 3512 my $s = $stat; 3513 $s =~ s/{.*$//s; 3514 3515 # Ignore goto labels. 3516 if ($s =~ /$Ident:\*$/s) { 3517 3518 # Ignore functions being called 3519 } elsif ($s =~ /^.\s*$Ident\s*\(/s) { 3520 3521 } elsif ($s =~ /^.\s*else\b/s) { 3522 3523 # declarations always start with types 3524 } elsif ($prev_values eq 'E' && $s =~ /^.\s*(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?((?:\s*$Ident)+?)\b(?:\s+$Sparse)?\s*\**\s*(?:$Ident|\(\*[^\)]*\))(?:\s*$Modifier)?\s*(?:;|=|,|\()/s) { 3525 my $type = $1; 3526 $type =~ s/\s+/ /g; 3527 possible($type, "A:" . $s); 3528 3529 # definitions in global scope can only start with types 3530 } elsif ($s =~ /^.(?:$Storage\s+)?(?:$Inline\s+)?(?:const\s+)?($Ident)\b\s*(?!:)/s) { 3531 possible($1, "B:" . $s); 3532 } 3533 3534 # any (foo ... *) is a pointer cast, and foo is a type 3535 while ($s =~ /\(($Ident)(?:\s+$Sparse)*[\s\*]+\s*\)/sg) { 3536 possible($1, "C:" . $s); 3537 } 3538 3539 # Check for any sort of function declaration. 3540 # int foo(something bar, other baz); 3541 # void (*store_gdt)(x86_descr_ptr *); 3542 if ($prev_values eq 'E' && $s =~ /^(.(?:typedef\s*)?(?:(?:$Storage|$Inline)\s*)*\s*$Type\s*(?:\b$Ident|\(\*\s*$Ident\))\s*)\(/s) { 3543 my ($name_len) = length($1); 3544 3545 my $ctx = $s; 3546 substr($ctx, 0, $name_len + 1, ''); 3547 $ctx =~ s/\)[^\)]*$//; 3548 3549 for my $arg (split(/\s*,\s*/, $ctx)) { 3550 if ($arg =~ /^(?:const\s+)?($Ident)(?:\s+$Sparse)*\s*\**\s*(:?\b$Ident)?$/s || $arg =~ /^($Ident)$/s) { 3551 3552 possible($1, "D:" . $s); 3553 } 3554 } 3555 } 3556 3557 } 3558 3559# 3560# Checks which may be anchored in the context. 3561# 3562 3563# Check for switch () and associated case and default 3564# statements should be at the same indent. 3565 if ($line=~/\bswitch\s*\(.*\)/) { 3566 my $err = ''; 3567 my $sep = ''; 3568 my @ctx = ctx_block_outer($linenr, $realcnt); 3569 shift(@ctx); 3570 for my $ctx (@ctx) { 3571 my ($clen, $cindent) = line_stats($ctx); 3572 if ($ctx =~ /^\+\s*(case\s+|default:)/ && 3573 $indent != $cindent) { 3574 $err .= "$sep$ctx\n"; 3575 $sep = ''; 3576 } else { 3577 $sep = "[...]\n"; 3578 } 3579 } 3580 if ($err ne '') { 3581 ERROR("SWITCH_CASE_INDENT_LEVEL", 3582 "switch and case should be at the same indent\n$hereline$err"); 3583 } 3584 } 3585 3586# if/while/etc brace do not go on next line, unless defining a do while loop, 3587# or if that brace on the next line is for something else 3588 if ($line =~ /(.*)\b((?:if|while|for|switch|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|do\b|else\b)/ && $line !~ /^.\s*\#/) { 3589 my $pre_ctx = "$1$2"; 3590 3591 my ($level, @ctx) = ctx_statement_level($linenr, $realcnt, 0); 3592 3593 if ($line =~ /^\+\t{6,}/) { 3594 WARN("DEEP_INDENTATION", 3595 "Too many leading tabs - consider code refactoring\n" . $herecurr); 3596 } 3597 3598 my $ctx_cnt = $realcnt - $#ctx - 1; 3599 my $ctx = join("\n", @ctx); 3600 3601 my $ctx_ln = $linenr; 3602 my $ctx_skip = $realcnt; 3603 3604 while ($ctx_skip > $ctx_cnt || ($ctx_skip == $ctx_cnt && 3605 defined $lines[$ctx_ln - 1] && 3606 $lines[$ctx_ln - 1] =~ /^-/)) { 3607 ##print "SKIP<$ctx_skip> CNT<$ctx_cnt>\n"; 3608 $ctx_skip-- if (!defined $lines[$ctx_ln - 1] || $lines[$ctx_ln - 1] !~ /^-/); 3609 $ctx_ln++; 3610 } 3611 3612 #print "realcnt<$realcnt> ctx_cnt<$ctx_cnt>\n"; 3613 #print "pre<$pre_ctx>\nline<$line>\nctx<$ctx>\nnext<$lines[$ctx_ln - 1]>\n"; 3614 3615 if ($ctx !~ /{\s*/ && defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/) { 3616 ERROR("OPEN_BRACE", 3617 "that open brace { should be on the previous line\n" . 3618 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n"); 3619 } 3620 if ($level == 0 && $pre_ctx !~ /}\s*while\s*\($/ && 3621 $ctx =~ /\)\s*\;\s*$/ && 3622 defined $lines[$ctx_ln - 1]) 3623 { 3624 my ($nlength, $nindent) = line_stats($lines[$ctx_ln - 1]); 3625 if ($nindent > $indent) { 3626 WARN("TRAILING_SEMICOLON", 3627 "trailing semicolon indicates no statements, indent implies otherwise\n" . 3628 "$here\n$ctx\n$rawlines[$ctx_ln - 1]\n"); 3629 } 3630 } 3631 } 3632 3633# Check relative indent for conditionals and blocks. 3634 if ($line =~ /\b(?:(?:if|while|for|(?:[a-z_]+|)for_each[a-z_]+)\s*\(|(?:do|else)\b)/ && $line !~ /^.\s*#/ && $line !~ /\}\s*while\s*/) { 3635 ($stat, $cond, $line_nr_next, $remain_next, $off_next) = 3636 ctx_statement_block($linenr, $realcnt, 0) 3637 if (!defined $stat); 3638 my ($s, $c) = ($stat, $cond); 3639 3640 substr($s, 0, length($c), ''); 3641 3642 # remove inline comments 3643 $s =~ s/$;/ /g; 3644 $c =~ s/$;/ /g; 3645 3646 # Find out how long the conditional actually is. 3647 my @newlines = ($c =~ /\n/gs); 3648 my $cond_lines = 1 + $#newlines; 3649 3650 # Make sure we remove the line prefixes as we have 3651 # none on the first line, and are going to readd them 3652 # where necessary. 3653 $s =~ s/\n./\n/gs; 3654 while ($s =~ /\n\s+\\\n/) { 3655 $cond_lines += $s =~ s/\n\s+\\\n/\n/g; 3656 } 3657 3658 # We want to check the first line inside the block 3659 # starting at the end of the conditional, so remove: 3660 # 1) any blank line termination 3661 # 2) any opening brace { on end of the line 3662 # 3) any do (...) { 3663 my $continuation = 0; 3664 my $check = 0; 3665 $s =~ s/^.*\bdo\b//; 3666 $s =~ s/^\s*{//; 3667 if ($s =~ s/^\s*\\//) { 3668 $continuation = 1; 3669 } 3670 if ($s =~ s/^\s*?\n//) { 3671 $check = 1; 3672 $cond_lines++; 3673 } 3674 3675 # Also ignore a loop construct at the end of a 3676 # preprocessor statement. 3677 if (($prevline =~ /^.\s*#\s*define\s/ || 3678 $prevline =~ /\\\s*$/) && $continuation == 0) { 3679 $check = 0; 3680 } 3681 3682 my $cond_ptr = -1; 3683 $continuation = 0; 3684 while ($cond_ptr != $cond_lines) { 3685 $cond_ptr = $cond_lines; 3686 3687 # If we see an #else/#elif then the code 3688 # is not linear. 3689 if ($s =~ /^\s*\#\s*(?:else|elif)/) { 3690 $check = 0; 3691 } 3692 3693 # Ignore: 3694 # 1) blank lines, they should be at 0, 3695 # 2) preprocessor lines, and 3696 # 3) labels. 3697 if ($continuation || 3698 $s =~ /^\s*?\n/ || 3699 $s =~ /^\s*#\s*?/ || 3700 $s =~ /^\s*$Ident\s*:/) { 3701 $continuation = ($s =~ /^.*?\\\n/) ? 1 : 0; 3702 if ($s =~ s/^.*?\n//) { 3703 $cond_lines++; 3704 } 3705 } 3706 } 3707 3708 my (undef, $sindent) = line_stats("+" . $s); 3709 my $stat_real = raw_line($linenr, $cond_lines); 3710 3711 # Check if either of these lines are modified, else 3712 # this is not this patch's fault. 3713 if (!defined($stat_real) || 3714 $stat !~ /^\+/ && $stat_real !~ /^\+/) { 3715 $check = 0; 3716 } 3717 if (defined($stat_real) && $cond_lines > 1) { 3718 $stat_real = "[...]\n$stat_real"; 3719 } 3720 3721 #print "line<$line> prevline<$prevline> indent<$indent> sindent<$sindent> check<$check> continuation<$continuation> s<$s> cond_lines<$cond_lines> stat_real<$stat_real> stat<$stat>\n"; 3722 3723 if ($check && $s ne '' && 3724 (($sindent % 8) != 0 || 3725 ($sindent < $indent) || 3726 ($sindent == $indent && 3727 ($s !~ /^\s*(?:\}|\{|else\b)/)) || 3728 ($sindent > $indent + 8))) { 3729 WARN("SUSPECT_CODE_INDENT", 3730 "suspect code indent for conditional statements ($indent, $sindent)\n" . $herecurr . "$stat_real\n"); 3731 } 3732 } 3733 3734 # Track the 'values' across context and added lines. 3735 my $opline = $line; $opline =~ s/^./ /; 3736 my ($curr_values, $curr_vars) = 3737 annotate_values($opline . "\n", $prev_values); 3738 $curr_values = $prev_values . $curr_values; 3739 if ($dbg_values) { 3740 my $outline = $opline; $outline =~ s/\t/ /g; 3741 print "$linenr > .$outline\n"; 3742 print "$linenr > $curr_values\n"; 3743 print "$linenr > $curr_vars\n"; 3744 } 3745 $prev_values = substr($curr_values, -1); 3746 3747#ignore lines not being added 3748 next if ($line =~ /^[^\+]/); 3749 3750# check for dereferences that span multiple lines 3751 if ($prevline =~ /^\+.*$Lval\s*(?:\.|->)\s*$/ && 3752 $line =~ /^\+\s*(?!\#\s*(?!define\s+|if))\s*$Lval/) { 3753 $prevline =~ /($Lval\s*(?:\.|->))\s*$/; 3754 my $ref = $1; 3755 $line =~ /^.\s*($Lval)/; 3756 $ref .= $1; 3757 $ref =~ s/\s//g; 3758 WARN("MULTILINE_DEREFERENCE", 3759 "Avoid multiple line dereference - prefer '$ref'\n" . $hereprev); 3760 } 3761 3762# check for declarations of signed or unsigned without int 3763 while ($line =~ m{\b($Declare)\s*(?!char\b|short\b|int\b|long\b)\s*($Ident)?\s*[=,;\[\)\(]}g) { 3764 my $type = $1; 3765 my $var = $2; 3766 $var = "" if (!defined $var); 3767 if ($type =~ /^(?:(?:$Storage|$Inline|$Attribute)\s+)*((?:un)?signed)((?:\s*\*)*)\s*$/) { 3768 my $sign = $1; 3769 my $pointer = $2; 3770 3771 $pointer = "" if (!defined $pointer); 3772 3773 if (WARN("UNSPECIFIED_INT", 3774 "Prefer '" . trim($sign) . " int" . rtrim($pointer) . "' to bare use of '$sign" . rtrim($pointer) . "'\n" . $herecurr) && 3775 $fix) { 3776 my $decl = trim($sign) . " int "; 3777 my $comp_pointer = $pointer; 3778 $comp_pointer =~ s/\s//g; 3779 $decl .= $comp_pointer; 3780 $decl = rtrim($decl) if ($var eq ""); 3781 $fixed[$fixlinenr] =~ s@\b$sign\s*\Q$pointer\E\s*$var\b@$decl$var@; 3782 } 3783 } 3784 } 3785 3786# TEST: allow direct testing of the type matcher. 3787 if ($dbg_type) { 3788 if ($line =~ /^.\s*$Declare\s*$/) { 3789 ERROR("TEST_TYPE", 3790 "TEST: is type\n" . $herecurr); 3791 } elsif ($dbg_type > 1 && $line =~ /^.+($Declare)/) { 3792 ERROR("TEST_NOT_TYPE", 3793 "TEST: is not type ($1 is)\n". $herecurr); 3794 } 3795 next; 3796 } 3797# TEST: allow direct testing of the attribute matcher. 3798 if ($dbg_attr) { 3799 if ($line =~ /^.\s*$Modifier\s*$/) { 3800 ERROR("TEST_ATTR", 3801 "TEST: is attr\n" . $herecurr); 3802 } elsif ($dbg_attr > 1 && $line =~ /^.+($Modifier)/) { 3803 ERROR("TEST_NOT_ATTR", 3804 "TEST: is not attr ($1 is)\n". $herecurr); 3805 } 3806 next; 3807 } 3808 3809# check for initialisation to aggregates open brace on the next line 3810 if ($line =~ /^.\s*{/ && 3811 $prevline =~ /(?:^|[^=])=\s*$/) { 3812 if (ERROR("OPEN_BRACE", 3813 "that open brace { should be on the previous line\n" . $hereprev) && 3814 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { 3815 fix_delete_line($fixlinenr - 1, $prevrawline); 3816 fix_delete_line($fixlinenr, $rawline); 3817 my $fixedline = $prevrawline; 3818 $fixedline =~ s/\s*=\s*$/ = {/; 3819 fix_insert_line($fixlinenr, $fixedline); 3820 $fixedline = $line; 3821 $fixedline =~ s/^(.\s*)\{\s*/$1/; 3822 fix_insert_line($fixlinenr, $fixedline); 3823 } 3824 } 3825 3826# 3827# Checks which are anchored on the added line. 3828# 3829 3830# check for malformed paths in #include statements (uses RAW line) 3831 if ($rawline =~ m{^.\s*\#\s*include\s+[<"](.*)[">]}) { 3832 my $path = $1; 3833 if ($path =~ m{//}) { 3834 ERROR("MALFORMED_INCLUDE", 3835 "malformed #include filename\n" . $herecurr); 3836 } 3837 if ($path =~ "^uapi/" && $realfile =~ m@\binclude/uapi/@) { 3838 ERROR("UAPI_INCLUDE", 3839 "No #include in ...include/uapi/... should use a uapi/ path prefix\n" . $herecurr); 3840 } 3841 } 3842 3843# no C99 // comments 3844 if ($line =~ m{//}) { 3845 if (ERROR("C99_COMMENTS", 3846 "do not use C99 // comments\n" . $herecurr) && 3847 $fix) { 3848 my $line = $fixed[$fixlinenr]; 3849 if ($line =~ /\/\/(.*)$/) { 3850 my $comment = trim($1); 3851 $fixed[$fixlinenr] =~ s@\/\/(.*)$@/\* $comment \*/@; 3852 } 3853 } 3854 } 3855 # Remove C99 comments. 3856 $line =~ s@//.*@@; 3857 $opline =~ s@//.*@@; 3858 3859# EXPORT_SYMBOL should immediately follow the thing it is exporting, consider 3860# the whole statement. 3861#print "APW <$lines[$realline_next - 1]>\n"; 3862 if (defined $realline_next && 3863 exists $lines[$realline_next - 1] && 3864 !defined $suppress_export{$realline_next} && 3865 ($lines[$realline_next - 1] =~ /EXPORT_SYMBOL.*\((.*)\)/ || 3866 $lines[$realline_next - 1] =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) { 3867 # Handle definitions which produce identifiers with 3868 # a prefix: 3869 # XXX(foo); 3870 # EXPORT_SYMBOL(something_foo); 3871 my $name = $1; 3872 if ($stat =~ /^(?:.\s*}\s*\n)?.([A-Z_]+)\s*\(\s*($Ident)/ && 3873 $name =~ /^${Ident}_$2/) { 3874#print "FOO C name<$name>\n"; 3875 $suppress_export{$realline_next} = 1; 3876 3877 } elsif ($stat !~ /(?: 3878 \n.}\s*$| 3879 ^.DEFINE_$Ident\(\Q$name\E\)| 3880 ^.DECLARE_$Ident\(\Q$name\E\)| 3881 ^.LIST_HEAD\(\Q$name\E\)| 3882 ^.(?:$Storage\s+)?$Type\s*\(\s*\*\s*\Q$name\E\s*\)\s*\(| 3883 \b\Q$name\E(?:\s+$Attribute)*\s*(?:;|=|\[|\() 3884 )/x) { 3885#print "FOO A<$lines[$realline_next - 1]> stat<$stat> name<$name>\n"; 3886 $suppress_export{$realline_next} = 2; 3887 } else { 3888 $suppress_export{$realline_next} = 1; 3889 } 3890 } 3891 if (!defined $suppress_export{$linenr} && 3892 $prevline =~ /^.\s*$/ && 3893 ($line =~ /EXPORT_SYMBOL.*\((.*)\)/ || 3894 $line =~ /EXPORT_UNUSED_SYMBOL.*\((.*)\)/)) { 3895#print "FOO B <$lines[$linenr - 1]>\n"; 3896 $suppress_export{$linenr} = 2; 3897 } 3898 if (defined $suppress_export{$linenr} && 3899 $suppress_export{$linenr} == 2) { 3900 WARN("EXPORT_SYMBOL", 3901 "EXPORT_SYMBOL(foo); should immediately follow its function/variable\n" . $herecurr); 3902 } 3903 3904# check for global initialisers. 3905 if ($line =~ /^\+$Type\s*$Ident(?:\s+$Modifier)*\s*=\s*($zero_initializer)\s*;/) { 3906 if (ERROR("GLOBAL_INITIALISERS", 3907 "do not initialise globals to $1\n" . $herecurr) && 3908 $fix) { 3909 $fixed[$fixlinenr] =~ s/(^.$Type\s*$Ident(?:\s+$Modifier)*)\s*=\s*$zero_initializer\s*;/$1;/; 3910 } 3911 } 3912# check for static initialisers. 3913 if ($line =~ /^\+.*\bstatic\s.*=\s*($zero_initializer)\s*;/) { 3914 if (ERROR("INITIALISED_STATIC", 3915 "do not initialise statics to $1\n" . 3916 $herecurr) && 3917 $fix) { 3918 $fixed[$fixlinenr] =~ s/(\bstatic\s.*?)\s*=\s*$zero_initializer\s*;/$1;/; 3919 } 3920 } 3921 3922# check for misordered declarations of char/short/int/long with signed/unsigned 3923 while ($sline =~ m{(\b$TypeMisordered\b)}g) { 3924 my $tmp = trim($1); 3925 WARN("MISORDERED_TYPE", 3926 "type '$tmp' should be specified in [[un]signed] [short|int|long|long long] order\n" . $herecurr); 3927 } 3928 3929# check for unnecessary <signed> int declarations of short/long/long long 3930 while ($sline =~ m{\b($TypeMisordered(\s*\*)*|$C90_int_types)\b}g) { 3931 my $type = trim($1); 3932 next if ($type !~ /\bint\b/); 3933 next if ($type !~ /\b(?:short|long\s+long|long)\b/); 3934 my $new_type = $type; 3935 $new_type =~ s/\b\s*int\s*\b/ /; 3936 $new_type =~ s/\b\s*(?:un)?signed\b\s*/ /; 3937 $new_type =~ s/^const\s+//; 3938 $new_type = "unsigned $new_type" if ($type =~ /\bunsigned\b/); 3939 $new_type = "const $new_type" if ($type =~ /^const\b/); 3940 $new_type =~ s/\s+/ /g; 3941 $new_type = trim($new_type); 3942 if (WARN("UNNECESSARY_INT", 3943 "Prefer '$new_type' over '$type' as the int is unnecessary\n" . $herecurr) && 3944 $fix) { 3945 $fixed[$fixlinenr] =~ s/\b\Q$type\E\b/$new_type/; 3946 } 3947 } 3948 3949# check for static const char * arrays. 3950 if ($line =~ /\bstatic\s+const\s+char\s*\*\s*(\w+)\s*\[\s*\]\s*=\s*/) { 3951 WARN("STATIC_CONST_CHAR_ARRAY", 3952 "static const char * array should probably be static const char * const\n" . 3953 $herecurr); 3954 } 3955 3956# check for initialized const char arrays that should be static const 3957 if ($line =~ /^\+\s*const\s+(char|unsigned\s+char|_*u8|(?:[us]_)?int8_t)\s+\w+\s*\[\s*(?:\w+\s*)?\]\s*=\s*"/) { 3958 if (WARN("STATIC_CONST_CHAR_ARRAY", 3959 "const array should probably be static const\n" . $herecurr) && 3960 $fix) { 3961 $fixed[$fixlinenr] =~ s/(^.\s*)const\b/${1}static const/; 3962 } 3963 } 3964 3965# check for static char foo[] = "bar" declarations. 3966 if ($line =~ /\bstatic\s+char\s+(\w+)\s*\[\s*\]\s*=\s*"/) { 3967 WARN("STATIC_CONST_CHAR_ARRAY", 3968 "static char array declaration should probably be static const char\n" . 3969 $herecurr); 3970 } 3971 3972# check for const <foo> const where <foo> is not a pointer or array type 3973 if ($sline =~ /\bconst\s+($BasicType)\s+const\b/) { 3974 my $found = $1; 3975 if ($sline =~ /\bconst\s+\Q$found\E\s+const\b\s*\*/) { 3976 WARN("CONST_CONST", 3977 "'const $found const *' should probably be 'const $found * const'\n" . $herecurr); 3978 } elsif ($sline !~ /\bconst\s+\Q$found\E\s+const\s+\w+\s*\[/) { 3979 WARN("CONST_CONST", 3980 "'const $found const' should probably be 'const $found'\n" . $herecurr); 3981 } 3982 } 3983 3984# check for non-global char *foo[] = {"bar", ...} declarations. 3985 if ($line =~ /^.\s+(?:static\s+|const\s+)?char\s+\*\s*\w+\s*\[\s*\]\s*=\s*\{/) { 3986 WARN("STATIC_CONST_CHAR_ARRAY", 3987 "char * array declaration might be better as static const\n" . 3988 $herecurr); 3989 } 3990 3991# check for sizeof(foo)/sizeof(foo[0]) that could be ARRAY_SIZE(foo) 3992 if ($line =~ m@\bsizeof\s*\(\s*($Lval)\s*\)@) { 3993 my $array = $1; 3994 if ($line =~ m@\b(sizeof\s*\(\s*\Q$array\E\s*\)\s*/\s*sizeof\s*\(\s*\Q$array\E\s*\[\s*0\s*\]\s*\))@) { 3995 my $array_div = $1; 3996 if (WARN("ARRAY_SIZE", 3997 "Prefer ARRAY_SIZE($array)\n" . $herecurr) && 3998 $fix) { 3999 $fixed[$fixlinenr] =~ s/\Q$array_div\E/ARRAY_SIZE($array)/; 4000 } 4001 } 4002 } 4003 4004# check for function declarations without arguments like "int foo()" 4005 if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) { 4006 if (ERROR("FUNCTION_WITHOUT_ARGS", 4007 "Bad function definition - $1() should probably be $1(void)\n" . $herecurr) && 4008 $fix) { 4009 $fixed[$fixlinenr] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/; 4010 } 4011 } 4012 4013# check for new typedefs, only function parameters and sparse annotations 4014# make sense. 4015 if ($line =~ /\btypedef\s/ && 4016 $line !~ /\btypedef\s+$Type\s*\(\s*\*?$Ident\s*\)\s*\(/ && 4017 $line !~ /\btypedef\s+$Type\s+$Ident\s*\(/ && 4018 $line !~ /\b$typeTypedefs\b/ && 4019 $line !~ /\b__bitwise\b/) { 4020 WARN("NEW_TYPEDEFS", 4021 "do not add new typedefs\n" . $herecurr); 4022 } 4023 4024# * goes on variable not on type 4025 # (char*[ const]) 4026 while ($line =~ m{(\($NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)\))}g) { 4027 #print "AA<$1>\n"; 4028 my ($ident, $from, $to) = ($1, $2, $2); 4029 4030 # Should start with a space. 4031 $to =~ s/^(\S)/ $1/; 4032 # Should not end with a space. 4033 $to =~ s/\s+$//; 4034 # '*'s should not have spaces between. 4035 while ($to =~ s/\*\s+\*/\*\*/) { 4036 } 4037 4038## print "1: from<$from> to<$to> ident<$ident>\n"; 4039 if ($from ne $to) { 4040 if (ERROR("POINTER_LOCATION", 4041 "\"(foo$from)\" should be \"(foo$to)\"\n" . $herecurr) && 4042 $fix) { 4043 my $sub_from = $ident; 4044 my $sub_to = $ident; 4045 $sub_to =~ s/\Q$from\E/$to/; 4046 $fixed[$fixlinenr] =~ 4047 s@\Q$sub_from\E@$sub_to@; 4048 } 4049 } 4050 } 4051 while ($line =~ m{(\b$NonptrType(\s*(?:$Modifier\b\s*|\*\s*)+)($Ident))}g) { 4052 #print "BB<$1>\n"; 4053 my ($match, $from, $to, $ident) = ($1, $2, $2, $3); 4054 4055 # Should start with a space. 4056 $to =~ s/^(\S)/ $1/; 4057 # Should not end with a space. 4058 $to =~ s/\s+$//; 4059 # '*'s should not have spaces between. 4060 while ($to =~ s/\*\s+\*/\*\*/) { 4061 } 4062 # Modifiers should have spaces. 4063 $to =~ s/(\b$Modifier$)/$1 /; 4064 4065## print "2: from<$from> to<$to> ident<$ident>\n"; 4066 if ($from ne $to && $ident !~ /^$Modifier$/) { 4067 if (ERROR("POINTER_LOCATION", 4068 "\"foo${from}bar\" should be \"foo${to}bar\"\n" . $herecurr) && 4069 $fix) { 4070 4071 my $sub_from = $match; 4072 my $sub_to = $match; 4073 $sub_to =~ s/\Q$from\E/$to/; 4074 $fixed[$fixlinenr] =~ 4075 s@\Q$sub_from\E@$sub_to@; 4076 } 4077 } 4078 } 4079 4080# avoid BUG() or BUG_ON() 4081 if ($line =~ /\b(?:BUG|BUG_ON)\b/) { 4082 my $msg_level = \&WARN; 4083 $msg_level = \&CHK if ($file); 4084 &{$msg_level}("AVOID_BUG", 4085 "Avoid crashing the kernel - try using WARN_ON & recovery code rather than BUG() or BUG_ON()\n" . $herecurr); 4086 } 4087 4088# avoid LINUX_VERSION_CODE 4089 if ($line =~ /\bLINUX_VERSION_CODE\b/) { 4090 WARN("LINUX_VERSION_CODE", 4091 "LINUX_VERSION_CODE should be avoided, code should be for the version to which it is merged\n" . $herecurr); 4092 } 4093 4094# check for uses of printk_ratelimit 4095 if ($line =~ /\bprintk_ratelimit\s*\(/) { 4096 WARN("PRINTK_RATELIMITED", 4097 "Prefer printk_ratelimited or pr_<level>_ratelimited to printk_ratelimit\n" . $herecurr); 4098 } 4099 4100# printk should use KERN_* levels 4101 if ($line =~ /\bprintk\s*\(\s*(?!KERN_[A-Z]+\b)/) { 4102 WARN("PRINTK_WITHOUT_KERN_LEVEL", 4103 "printk() should include KERN_<LEVEL> facility level\n" . $herecurr); 4104 } 4105 4106 if ($line =~ /\bprintk\s*\(\s*KERN_([A-Z]+)/) { 4107 my $orig = $1; 4108 my $level = lc($orig); 4109 $level = "warn" if ($level eq "warning"); 4110 my $level2 = $level; 4111 $level2 = "dbg" if ($level eq "debug"); 4112 WARN("PREFER_PR_LEVEL", 4113 "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(... to printk(KERN_$orig ...\n" . $herecurr); 4114 } 4115 4116 if ($line =~ /\bpr_warning\s*\(/) { 4117 if (WARN("PREFER_PR_LEVEL", 4118 "Prefer pr_warn(... to pr_warning(...\n" . $herecurr) && 4119 $fix) { 4120 $fixed[$fixlinenr] =~ 4121 s/\bpr_warning\b/pr_warn/; 4122 } 4123 } 4124 4125 if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) { 4126 my $orig = $1; 4127 my $level = lc($orig); 4128 $level = "warn" if ($level eq "warning"); 4129 $level = "dbg" if ($level eq "debug"); 4130 WARN("PREFER_DEV_LEVEL", 4131 "Prefer dev_$level(... to dev_printk(KERN_$orig, ...\n" . $herecurr); 4132 } 4133 4134# ENOSYS means "bad syscall nr" and nothing else. This will have a small 4135# number of false positives, but assembly files are not checked, so at 4136# least the arch entry code will not trigger this warning. 4137 if ($line =~ /\bENOSYS\b/) { 4138 WARN("ENOSYS", 4139 "ENOSYS means 'invalid syscall nr' and nothing else\n" . $herecurr); 4140 } 4141 4142# function brace can't be on same line, except for #defines of do while, 4143# or if closed on same line 4144 if ($perl_version_ok && 4145 $sline =~ /$Type\s*$Ident\s*$balanced_parens\s*\{/ && 4146 $sline !~ /\#\s*define\b.*do\s*\{/ && 4147 $sline !~ /}/) { 4148 if (ERROR("OPEN_BRACE", 4149 "open brace '{' following function definitions go on the next line\n" . $herecurr) && 4150 $fix) { 4151 fix_delete_line($fixlinenr, $rawline); 4152 my $fixed_line = $rawline; 4153 $fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(.*)$/; 4154 my $line1 = $1; 4155 my $line2 = $2; 4156 fix_insert_line($fixlinenr, ltrim($line1)); 4157 fix_insert_line($fixlinenr, "\+{"); 4158 if ($line2 !~ /^\s*$/) { 4159 fix_insert_line($fixlinenr, "\+\t" . trim($line2)); 4160 } 4161 } 4162 } 4163 4164# open braces for enum, union and struct go on the same line. 4165 if ($line =~ /^.\s*{/ && 4166 $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) { 4167 if (ERROR("OPEN_BRACE", 4168 "open brace '{' following $1 go on the same line\n" . $hereprev) && 4169 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { 4170 fix_delete_line($fixlinenr - 1, $prevrawline); 4171 fix_delete_line($fixlinenr, $rawline); 4172 my $fixedline = rtrim($prevrawline) . " {"; 4173 fix_insert_line($fixlinenr, $fixedline); 4174 $fixedline = $rawline; 4175 $fixedline =~ s/^(.\s*)\{\s*/$1\t/; 4176 if ($fixedline !~ /^\+\s*$/) { 4177 fix_insert_line($fixlinenr, $fixedline); 4178 } 4179 } 4180 } 4181 4182# missing space after union, struct or enum definition 4183 if ($line =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident){1,2}[=\{]/) { 4184 if (WARN("SPACING", 4185 "missing space after $1 definition\n" . $herecurr) && 4186 $fix) { 4187 $fixed[$fixlinenr] =~ 4188 s/^(.\s*(?:typedef\s+)?(?:enum|union|struct)(?:\s+$Ident){1,2})([=\{])/$1 $2/; 4189 } 4190 } 4191 4192# Function pointer declarations 4193# check spacing between type, funcptr, and args 4194# canonical declaration is "type (*funcptr)(args...)" 4195 if ($line =~ /^.\s*($Declare)\((\s*)\*(\s*)($Ident)(\s*)\)(\s*)\(/) { 4196 my $declare = $1; 4197 my $pre_pointer_space = $2; 4198 my $post_pointer_space = $3; 4199 my $funcname = $4; 4200 my $post_funcname_space = $5; 4201 my $pre_args_space = $6; 4202 4203# the $Declare variable will capture all spaces after the type 4204# so check it for a missing trailing missing space but pointer return types 4205# don't need a space so don't warn for those. 4206 my $post_declare_space = ""; 4207 if ($declare =~ /(\s+)$/) { 4208 $post_declare_space = $1; 4209 $declare = rtrim($declare); 4210 } 4211 if ($declare !~ /\*$/ && $post_declare_space =~ /^$/) { 4212 WARN("SPACING", 4213 "missing space after return type\n" . $herecurr); 4214 $post_declare_space = " "; 4215 } 4216 4217# unnecessary space "type (*funcptr)(args...)" 4218# This test is not currently implemented because these declarations are 4219# equivalent to 4220# int foo(int bar, ...) 4221# and this is form shouldn't/doesn't generate a checkpatch warning. 4222# 4223# elsif ($declare =~ /\s{2,}$/) { 4224# WARN("SPACING", 4225# "Multiple spaces after return type\n" . $herecurr); 4226# } 4227 4228# unnecessary space "type ( *funcptr)(args...)" 4229 if (defined $pre_pointer_space && 4230 $pre_pointer_space =~ /^\s/) { 4231 WARN("SPACING", 4232 "Unnecessary space after function pointer open parenthesis\n" . $herecurr); 4233 } 4234 4235# unnecessary space "type (* funcptr)(args...)" 4236 if (defined $post_pointer_space && 4237 $post_pointer_space =~ /^\s/) { 4238 WARN("SPACING", 4239 "Unnecessary space before function pointer name\n" . $herecurr); 4240 } 4241 4242# unnecessary space "type (*funcptr )(args...)" 4243 if (defined $post_funcname_space && 4244 $post_funcname_space =~ /^\s/) { 4245 WARN("SPACING", 4246 "Unnecessary space after function pointer name\n" . $herecurr); 4247 } 4248 4249# unnecessary space "type (*funcptr) (args...)" 4250 if (defined $pre_args_space && 4251 $pre_args_space =~ /^\s/) { 4252 WARN("SPACING", 4253 "Unnecessary space before function pointer arguments\n" . $herecurr); 4254 } 4255 4256 if (show_type("SPACING") && $fix) { 4257 $fixed[$fixlinenr] =~ 4258 s/^(.\s*)$Declare\s*\(\s*\*\s*$Ident\s*\)\s*\(/$1 . $declare . $post_declare_space . '(*' . $funcname . ')('/ex; 4259 } 4260 } 4261 4262# check for spacing round square brackets; allowed: 4263# 1. with a type on the left -- int [] a; 4264# 2. at the beginning of a line for slice initialisers -- [0...10] = 5, 4265# 3. inside a curly brace -- = { [0...10] = 5 } 4266 while ($line =~ /(.*?\s)\[/g) { 4267 my ($where, $prefix) = ($-[1], $1); 4268 if ($prefix !~ /$Type\s+$/ && 4269 ($where != 0 || $prefix !~ /^.\s+$/) && 4270 $prefix !~ /[{,:]\s+$/) { 4271 if (ERROR("BRACKET_SPACE", 4272 "space prohibited before open square bracket '['\n" . $herecurr) && 4273 $fix) { 4274 $fixed[$fixlinenr] =~ 4275 s/^(\+.*?)\s+\[/$1\[/; 4276 } 4277 } 4278 } 4279 4280# check for spaces between functions and their parentheses. 4281 while ($line =~ /($Ident)\s+\(/g) { 4282 my $name = $1; 4283 my $ctx_before = substr($line, 0, $-[1]); 4284 my $ctx = "$ctx_before$name"; 4285 4286 # Ignore those directives where spaces _are_ permitted. 4287 if ($name =~ /^(?: 4288 if|for|while|switch|return|case| 4289 volatile|__volatile__| 4290 __attribute__|format|__extension__| 4291 asm|__asm__)$/x) 4292 { 4293 # cpp #define statements have non-optional spaces, ie 4294 # if there is a space between the name and the open 4295 # parenthesis it is simply not a parameter group. 4296 } elsif ($ctx_before =~ /^.\s*\#\s*define\s*$/) { 4297 4298 # cpp #elif statement condition may start with a ( 4299 } elsif ($ctx =~ /^.\s*\#\s*elif\s*$/) { 4300 4301 # If this whole things ends with a type its most 4302 # likely a typedef for a function. 4303 } elsif ($ctx =~ /$Type$/) { 4304 4305 } else { 4306 if (WARN("SPACING", 4307 "space prohibited between function name and open parenthesis '('\n" . $herecurr) && 4308 $fix) { 4309 $fixed[$fixlinenr] =~ 4310 s/\b$name\s+\(/$name\(/; 4311 } 4312 } 4313 } 4314 4315# Check operator spacing. 4316 if (!($line=~/\#\s*include/)) { 4317 my $fixed_line = ""; 4318 my $line_fixed = 0; 4319 4320 my $ops = qr{ 4321 <<=|>>=|<=|>=|==|!=| 4322 \+=|-=|\*=|\/=|%=|\^=|\|=|&=| 4323 =>|->|<<|>>|<|>|=|!|~| 4324 &&|\|\||,|\^|\+\+|--|&|\||\+|-|\*|\/|%| 4325 \?:|\?|: 4326 }x; 4327 my @elements = split(/($ops|;)/, $opline); 4328 4329## print("element count: <" . $#elements . ">\n"); 4330## foreach my $el (@elements) { 4331## print("el: <$el>\n"); 4332## } 4333 4334 my @fix_elements = (); 4335 my $off = 0; 4336 4337 foreach my $el (@elements) { 4338 push(@fix_elements, substr($rawline, $off, length($el))); 4339 $off += length($el); 4340 } 4341 4342 $off = 0; 4343 4344 my $blank = copy_spacing($opline); 4345 my $last_after = -1; 4346 4347 for (my $n = 0; $n < $#elements; $n += 2) { 4348 4349 my $good = $fix_elements[$n] . $fix_elements[$n + 1]; 4350 4351## print("n: <$n> good: <$good>\n"); 4352 4353 $off += length($elements[$n]); 4354 4355 # Pick up the preceding and succeeding characters. 4356 my $ca = substr($opline, 0, $off); 4357 my $cc = ''; 4358 if (length($opline) >= ($off + length($elements[$n + 1]))) { 4359 $cc = substr($opline, $off + length($elements[$n + 1])); 4360 } 4361 my $cb = "$ca$;$cc"; 4362 4363 my $a = ''; 4364 $a = 'V' if ($elements[$n] ne ''); 4365 $a = 'W' if ($elements[$n] =~ /\s$/); 4366 $a = 'C' if ($elements[$n] =~ /$;$/); 4367 $a = 'B' if ($elements[$n] =~ /(\[|\()$/); 4368 $a = 'O' if ($elements[$n] eq ''); 4369 $a = 'E' if ($ca =~ /^\s*$/); 4370 4371 my $op = $elements[$n + 1]; 4372 4373 my $c = ''; 4374 if (defined $elements[$n + 2]) { 4375 $c = 'V' if ($elements[$n + 2] ne ''); 4376 $c = 'W' if ($elements[$n + 2] =~ /^\s/); 4377 $c = 'C' if ($elements[$n + 2] =~ /^$;/); 4378 $c = 'B' if ($elements[$n + 2] =~ /^(\)|\]|;)/); 4379 $c = 'O' if ($elements[$n + 2] eq ''); 4380 $c = 'E' if ($elements[$n + 2] =~ /^\s*\\$/); 4381 } else { 4382 $c = 'E'; 4383 } 4384 4385 my $ctx = "${a}x${c}"; 4386 4387 my $at = "(ctx:$ctx)"; 4388 4389 my $ptr = substr($blank, 0, $off) . "^"; 4390 my $hereptr = "$hereline$ptr\n"; 4391 4392 # Pull out the value of this operator. 4393 my $op_type = substr($curr_values, $off + 1, 1); 4394 4395 # Get the full operator variant. 4396 my $opv = $op . substr($curr_vars, $off, 1); 4397 4398 # Ignore operators passed as parameters. 4399 if ($op_type ne 'V' && 4400 $ca =~ /\s$/ && $cc =~ /^\s*[,\)]/) { 4401 4402# # Ignore comments 4403# } elsif ($op =~ /^$;+$/) { 4404 4405 # ; should have either the end of line or a space or \ after it 4406 } elsif ($op eq ';') { 4407 if ($ctx !~ /.x[WEBC]/ && 4408 $cc !~ /^\\/ && $cc !~ /^;/) { 4409 if (ERROR("SPACING", 4410 "space required after that '$op' $at\n" . $hereptr)) { 4411 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " "; 4412 $line_fixed = 1; 4413 } 4414 } 4415 4416 # // is a comment 4417 } elsif ($op eq '//') { 4418 4419 # : when part of a bitfield 4420 } elsif ($opv eq ':B') { 4421 # skip the bitfield test for now 4422 4423 # No spaces for: 4424 # -> 4425 } elsif ($op eq '->') { 4426 if ($ctx =~ /Wx.|.xW/) { 4427 if (ERROR("SPACING", 4428 "spaces prohibited around that '$op' $at\n" . $hereptr)) { 4429 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]); 4430 if (defined $fix_elements[$n + 2]) { 4431 $fix_elements[$n + 2] =~ s/^\s+//; 4432 } 4433 $line_fixed = 1; 4434 } 4435 } 4436 4437 # , must not have a space before and must have a space on the right. 4438 } elsif ($op eq ',') { 4439 my $rtrim_before = 0; 4440 my $space_after = 0; 4441 if ($ctx =~ /Wx./) { 4442 if (ERROR("SPACING", 4443 "space prohibited before that '$op' $at\n" . $hereptr)) { 4444 $line_fixed = 1; 4445 $rtrim_before = 1; 4446 } 4447 } 4448 if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/) { 4449 if (ERROR("SPACING", 4450 "space required after that '$op' $at\n" . $hereptr)) { 4451 $line_fixed = 1; 4452 $last_after = $n; 4453 $space_after = 1; 4454 } 4455 } 4456 if ($rtrim_before || $space_after) { 4457 if ($rtrim_before) { 4458 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]); 4459 } else { 4460 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]); 4461 } 4462 if ($space_after) { 4463 $good .= " "; 4464 } 4465 } 4466 4467 # '*' as part of a type definition -- reported already. 4468 } elsif ($opv eq '*_') { 4469 #warn "'*' is part of type\n"; 4470 4471 # unary operators should have a space before and 4472 # none after. May be left adjacent to another 4473 # unary operator, or a cast 4474 } elsif ($op eq '!' || $op eq '~' || 4475 $opv eq '*U' || $opv eq '-U' || 4476 $opv eq '&U' || $opv eq '&&U') { 4477 if ($ctx !~ /[WEBC]x./ && $ca !~ /(?:\)|!|~|\*|-|\&|\||\+\+|\-\-|\{)$/) { 4478 if (ERROR("SPACING", 4479 "space required before that '$op' $at\n" . $hereptr)) { 4480 if ($n != $last_after + 2) { 4481 $good = $fix_elements[$n] . " " . ltrim($fix_elements[$n + 1]); 4482 $line_fixed = 1; 4483 } 4484 } 4485 } 4486 if ($op eq '*' && $cc =~/\s*$Modifier\b/) { 4487 # A unary '*' may be const 4488 4489 } elsif ($ctx =~ /.xW/) { 4490 if (ERROR("SPACING", 4491 "space prohibited after that '$op' $at\n" . $hereptr)) { 4492 $good = $fix_elements[$n] . rtrim($fix_elements[$n + 1]); 4493 if (defined $fix_elements[$n + 2]) { 4494 $fix_elements[$n + 2] =~ s/^\s+//; 4495 } 4496 $line_fixed = 1; 4497 } 4498 } 4499 4500 # unary ++ and unary -- are allowed no space on one side. 4501 } elsif ($op eq '++' or $op eq '--') { 4502 if ($ctx !~ /[WEOBC]x[^W]/ && $ctx !~ /[^W]x[WOBEC]/) { 4503 if (ERROR("SPACING", 4504 "space required one side of that '$op' $at\n" . $hereptr)) { 4505 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]) . " "; 4506 $line_fixed = 1; 4507 } 4508 } 4509 if ($ctx =~ /Wx[BE]/ || 4510 ($ctx =~ /Wx./ && $cc =~ /^;/)) { 4511 if (ERROR("SPACING", 4512 "space prohibited before that '$op' $at\n" . $hereptr)) { 4513 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]); 4514 $line_fixed = 1; 4515 } 4516 } 4517 if ($ctx =~ /ExW/) { 4518 if (ERROR("SPACING", 4519 "space prohibited after that '$op' $at\n" . $hereptr)) { 4520 $good = $fix_elements[$n] . trim($fix_elements[$n + 1]); 4521 if (defined $fix_elements[$n + 2]) { 4522 $fix_elements[$n + 2] =~ s/^\s+//; 4523 } 4524 $line_fixed = 1; 4525 } 4526 } 4527 4528 # << and >> may either have or not have spaces both sides 4529 } elsif ($op eq '<<' or $op eq '>>' or 4530 $op eq '&' or $op eq '^' or $op eq '|' or 4531 $op eq '+' or $op eq '-' or 4532 $op eq '*' or $op eq '/' or 4533 $op eq '%') 4534 { 4535 if ($check) { 4536 if (defined $fix_elements[$n + 2] && $ctx !~ /[EW]x[EW]/) { 4537 if (CHK("SPACING", 4538 "spaces preferred around that '$op' $at\n" . $hereptr)) { 4539 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " "; 4540 $fix_elements[$n + 2] =~ s/^\s+//; 4541 $line_fixed = 1; 4542 } 4543 } elsif (!defined $fix_elements[$n + 2] && $ctx !~ /Wx[OE]/) { 4544 if (CHK("SPACING", 4545 "space preferred before that '$op' $at\n" . $hereptr)) { 4546 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]); 4547 $line_fixed = 1; 4548 } 4549 } 4550 } elsif ($ctx =~ /Wx[^WCE]|[^WCE]xW/) { 4551 if (ERROR("SPACING", 4552 "need consistent spacing around '$op' $at\n" . $hereptr)) { 4553 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " "; 4554 if (defined $fix_elements[$n + 2]) { 4555 $fix_elements[$n + 2] =~ s/^\s+//; 4556 } 4557 $line_fixed = 1; 4558 } 4559 } 4560 4561 # A colon needs no spaces before when it is 4562 # terminating a case value or a label. 4563 } elsif ($opv eq ':C' || $opv eq ':L') { 4564 if ($ctx =~ /Wx./) { 4565 if (ERROR("SPACING", 4566 "space prohibited before that '$op' $at\n" . $hereptr)) { 4567 $good = rtrim($fix_elements[$n]) . trim($fix_elements[$n + 1]); 4568 $line_fixed = 1; 4569 } 4570 } 4571 4572 # All the others need spaces both sides. 4573 } elsif ($ctx !~ /[EWC]x[CWE]/) { 4574 my $ok = 0; 4575 4576 # Ignore email addresses <foo@bar> 4577 if (($op eq '<' && 4578 $cc =~ /^\S+\@\S+>/) || 4579 ($op eq '>' && 4580 $ca =~ /<\S+\@\S+$/)) 4581 { 4582 $ok = 1; 4583 } 4584 4585 # for asm volatile statements 4586 # ignore a colon with another 4587 # colon immediately before or after 4588 if (($op eq ':') && 4589 ($ca =~ /:$/ || $cc =~ /^:/)) { 4590 $ok = 1; 4591 } 4592 4593 # messages are ERROR, but ?: are CHK 4594 if ($ok == 0) { 4595 my $msg_level = \&ERROR; 4596 $msg_level = \&CHK if (($op eq '?:' || $op eq '?' || $op eq ':') && $ctx =~ /VxV/); 4597 4598 if (&{$msg_level}("SPACING", 4599 "spaces required around that '$op' $at\n" . $hereptr)) { 4600 $good = rtrim($fix_elements[$n]) . " " . trim($fix_elements[$n + 1]) . " "; 4601 if (defined $fix_elements[$n + 2]) { 4602 $fix_elements[$n + 2] =~ s/^\s+//; 4603 } 4604 $line_fixed = 1; 4605 } 4606 } 4607 } 4608 $off += length($elements[$n + 1]); 4609 4610## print("n: <$n> GOOD: <$good>\n"); 4611 4612 $fixed_line = $fixed_line . $good; 4613 } 4614 4615 if (($#elements % 2) == 0) { 4616 $fixed_line = $fixed_line . $fix_elements[$#elements]; 4617 } 4618 4619 if ($fix && $line_fixed && $fixed_line ne $fixed[$fixlinenr]) { 4620 $fixed[$fixlinenr] = $fixed_line; 4621 } 4622 4623 4624 } 4625 4626# check for whitespace before a non-naked semicolon 4627 if ($line =~ /^\+.*\S\s+;\s*$/) { 4628 if (WARN("SPACING", 4629 "space prohibited before semicolon\n" . $herecurr) && 4630 $fix) { 4631 1 while $fixed[$fixlinenr] =~ 4632 s/^(\+.*\S)\s+;/$1;/; 4633 } 4634 } 4635 4636# check for multiple assignments 4637 if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) { 4638 CHK("MULTIPLE_ASSIGNMENTS", 4639 "multiple assignments should be avoided\n" . $herecurr); 4640 } 4641 4642## # check for multiple declarations, allowing for a function declaration 4643## # continuation. 4644## if ($line =~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Ident.*/ && 4645## $line !~ /^.\s*$Type\s+$Ident(?:\s*=[^,{]*)?\s*,\s*$Type\s*$Ident.*/) { 4646## 4647## # Remove any bracketed sections to ensure we do not 4648## # falsly report the parameters of functions. 4649## my $ln = $line; 4650## while ($ln =~ s/\([^\(\)]*\)//g) { 4651## } 4652## if ($ln =~ /,/) { 4653## WARN("MULTIPLE_DECLARATION", 4654## "declaring multiple variables together should be avoided\n" . $herecurr); 4655## } 4656## } 4657 4658#need space before brace following if, while, etc 4659 if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) || 4660 $line =~ /\b(?:else|do)\{/) { 4661 if (ERROR("SPACING", 4662 "space required before the open brace '{'\n" . $herecurr) && 4663 $fix) { 4664 $fixed[$fixlinenr] =~ s/^(\+.*(?:do|else|\)))\{/$1 {/; 4665 } 4666 } 4667 4668## # check for blank lines before declarations 4669## if ($line =~ /^.\t+$Type\s+$Ident(?:\s*=.*)?;/ && 4670## $prevrawline =~ /^.\s*$/) { 4671## WARN("SPACING", 4672## "No blank lines before declarations\n" . $hereprev); 4673## } 4674## 4675 4676# closing brace should have a space following it when it has anything 4677# on the line 4678 if ($line =~ /}(?!(?:,|;|\)|\}))\S/) { 4679 if (ERROR("SPACING", 4680 "space required after that close brace '}'\n" . $herecurr) && 4681 $fix) { 4682 $fixed[$fixlinenr] =~ 4683 s/}((?!(?:,|;|\)))\S)/} $1/; 4684 } 4685 } 4686 4687# check spacing on square brackets 4688 if ($line =~ /\[\s/ && $line !~ /\[\s*$/) { 4689 if (ERROR("SPACING", 4690 "space prohibited after that open square bracket '['\n" . $herecurr) && 4691 $fix) { 4692 $fixed[$fixlinenr] =~ 4693 s/\[\s+/\[/; 4694 } 4695 } 4696 if ($line =~ /\s\]/) { 4697 if (ERROR("SPACING", 4698 "space prohibited before that close square bracket ']'\n" . $herecurr) && 4699 $fix) { 4700 $fixed[$fixlinenr] =~ 4701 s/\s+\]/\]/; 4702 } 4703 } 4704 4705# check spacing on parentheses 4706 if ($line =~ /\(\s/ && $line !~ /\(\s*(?:\\)?$/ && 4707 $line !~ /for\s*\(\s+;/) { 4708 if (ERROR("SPACING", 4709 "space prohibited after that open parenthesis '('\n" . $herecurr) && 4710 $fix) { 4711 $fixed[$fixlinenr] =~ 4712 s/\(\s+/\(/; 4713 } 4714 } 4715 if ($line =~ /(\s+)\)/ && $line !~ /^.\s*\)/ && 4716 $line !~ /for\s*\(.*;\s+\)/ && 4717 $line !~ /:\s+\)/) { 4718 if (ERROR("SPACING", 4719 "space prohibited before that close parenthesis ')'\n" . $herecurr) && 4720 $fix) { 4721 $fixed[$fixlinenr] =~ 4722 s/\s+\)/\)/; 4723 } 4724 } 4725 4726# check unnecessary parentheses around addressof/dereference single $Lvals 4727# ie: &(foo->bar) should be &foo->bar and *(foo->bar) should be *foo->bar 4728 4729 while ($line =~ /(?:[^&]&\s*|\*)\(\s*($Ident\s*(?:$Member\s*)+)\s*\)/g) { 4730 my $var = $1; 4731 if (CHK("UNNECESSARY_PARENTHESES", 4732 "Unnecessary parentheses around $var\n" . $herecurr) && 4733 $fix) { 4734 $fixed[$fixlinenr] =~ s/\(\s*\Q$var\E\s*\)/$var/; 4735 } 4736 } 4737 4738# check for unnecessary parentheses around function pointer uses 4739# ie: (foo->bar)(); should be foo->bar(); 4740# but not "if (foo->bar) (" to avoid some false positives 4741 if ($line =~ /(\bif\s*|)(\(\s*$Ident\s*(?:$Member\s*)+\))[ \t]*\(/ && $1 !~ /^if/) { 4742 my $var = $2; 4743 if (CHK("UNNECESSARY_PARENTHESES", 4744 "Unnecessary parentheses around function pointer $var\n" . $herecurr) && 4745 $fix) { 4746 my $var2 = deparenthesize($var); 4747 $var2 =~ s/\s//g; 4748 $fixed[$fixlinenr] =~ s/\Q$var\E/$var2/; 4749 } 4750 } 4751 4752# check for unnecessary parentheses around comparisons in if uses 4753# when !drivers/staging or command-line uses --strict 4754 if (($realfile !~ m@^(?:drivers/staging/)@ || $check_orig) && 4755 $perl_version_ok && defined($stat) && 4756 $stat =~ /(^.\s*if\s*($balanced_parens))/) { 4757 my $if_stat = $1; 4758 my $test = substr($2, 1, -1); 4759 my $herectx; 4760 while ($test =~ /(?:^|[^\w\&\!\~])+\s*\(\s*([\&\!\~]?\s*$Lval\s*(?:$Compare\s*$FuncArg)?)\s*\)/g) { 4761 my $match = $1; 4762 # avoid parentheses around potential macro args 4763 next if ($match =~ /^\s*\w+\s*$/); 4764 if (!defined($herectx)) { 4765 $herectx = $here . "\n"; 4766 my $cnt = statement_rawlines($if_stat); 4767 for (my $n = 0; $n < $cnt; $n++) { 4768 my $rl = raw_line($linenr, $n); 4769 $herectx .= $rl . "\n"; 4770 last if $rl =~ /^[ \+].*\{/; 4771 } 4772 } 4773 CHK("UNNECESSARY_PARENTHESES", 4774 "Unnecessary parentheses around '$match'\n" . $herectx); 4775 } 4776 } 4777 4778#goto labels aren't indented, allow a single space however 4779 if ($line=~/^.\s+[A-Za-z\d_]+:(?![0-9]+)/ and 4780 !($line=~/^. [A-Za-z\d_]+:/) and !($line=~/^.\s+default:/)) { 4781 if (WARN("INDENTED_LABEL", 4782 "labels should not be indented\n" . $herecurr) && 4783 $fix) { 4784 $fixed[$fixlinenr] =~ 4785 s/^(.)\s+/$1/; 4786 } 4787 } 4788 4789# return is not a function 4790 if (defined($stat) && $stat =~ /^.\s*return(\s*)\(/s) { 4791 my $spacing = $1; 4792 if ($perl_version_ok && 4793 $stat =~ /^.\s*return\s*($balanced_parens)\s*;\s*$/) { 4794 my $value = $1; 4795 $value = deparenthesize($value); 4796 if ($value =~ m/^\s*$FuncArg\s*(?:\?|$)/) { 4797 ERROR("RETURN_PARENTHESES", 4798 "return is not a function, parentheses are not required\n" . $herecurr); 4799 } 4800 } elsif ($spacing !~ /\s+/) { 4801 ERROR("SPACING", 4802 "space required before the open parenthesis '('\n" . $herecurr); 4803 } 4804 } 4805 4806# unnecessary return in a void function 4807# at end-of-function, with the previous line a single leading tab, then return; 4808# and the line before that not a goto label target like "out:" 4809 if ($sline =~ /^[ \+]}\s*$/ && 4810 $prevline =~ /^\+\treturn\s*;\s*$/ && 4811 $linenr >= 3 && 4812 $lines[$linenr - 3] =~ /^[ +]/ && 4813 $lines[$linenr - 3] !~ /^[ +]\s*$Ident\s*:/) { 4814 WARN("RETURN_VOID", 4815 "void function return statements are not generally useful\n" . $hereprev); 4816 } 4817 4818# if statements using unnecessary parentheses - ie: if ((foo == bar)) 4819 if ($perl_version_ok && 4820 $line =~ /\bif\s*((?:\(\s*){2,})/) { 4821 my $openparens = $1; 4822 my $count = $openparens =~ tr@\(@\(@; 4823 my $msg = ""; 4824 if ($line =~ /\bif\s*(?:\(\s*){$count,$count}$LvalOrFunc\s*($Compare)\s*$LvalOrFunc(?:\s*\)){$count,$count}/) { 4825 my $comp = $4; #Not $1 because of $LvalOrFunc 4826 $msg = " - maybe == should be = ?" if ($comp eq "=="); 4827 WARN("UNNECESSARY_PARENTHESES", 4828 "Unnecessary parentheses$msg\n" . $herecurr); 4829 } 4830 } 4831 4832# comparisons with a constant or upper case identifier on the left 4833# avoid cases like "foo + BAR < baz" 4834# only fix matches surrounded by parentheses to avoid incorrect 4835# conversions like "FOO < baz() + 5" being "misfixed" to "baz() > FOO + 5" 4836 if ($perl_version_ok && 4837 $line =~ /^\+(.*)\b($Constant|[A-Z_][A-Z0-9_]*)\s*($Compare)\s*($LvalOrFunc)/) { 4838 my $lead = $1; 4839 my $const = $2; 4840 my $comp = $3; 4841 my $to = $4; 4842 my $newcomp = $comp; 4843 if ($lead !~ /(?:$Operators|\.)\s*$/ && 4844 $to !~ /^(?:Constant|[A-Z_][A-Z0-9_]*)$/ && 4845 WARN("CONSTANT_COMPARISON", 4846 "Comparisons should place the constant on the right side of the test\n" . $herecurr) && 4847 $fix) { 4848 if ($comp eq "<") { 4849 $newcomp = ">"; 4850 } elsif ($comp eq "<=") { 4851 $newcomp = ">="; 4852 } elsif ($comp eq ">") { 4853 $newcomp = "<"; 4854 } elsif ($comp eq ">=") { 4855 $newcomp = "<="; 4856 } 4857 $fixed[$fixlinenr] =~ s/\(\s*\Q$const\E\s*$Compare\s*\Q$to\E\s*\)/($to $newcomp $const)/; 4858 } 4859 } 4860 4861# Return of what appears to be an errno should normally be negative 4862 if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) { 4863 my $name = $1; 4864 if ($name ne 'EOF' && $name ne 'ERROR') { 4865 WARN("USE_NEGATIVE_ERRNO", 4866 "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr); 4867 } 4868 } 4869 4870# Need a space before open parenthesis after if, while etc 4871 if ($line =~ /\b(if|while|for|switch)\(/) { 4872 if (ERROR("SPACING", 4873 "space required before the open parenthesis '('\n" . $herecurr) && 4874 $fix) { 4875 $fixed[$fixlinenr] =~ 4876 s/\b(if|while|for|switch)\(/$1 \(/; 4877 } 4878 } 4879 4880# Check for illegal assignment in if conditional -- and check for trailing 4881# statements after the conditional. 4882 if ($line =~ /do\s*(?!{)/) { 4883 ($stat, $cond, $line_nr_next, $remain_next, $off_next) = 4884 ctx_statement_block($linenr, $realcnt, 0) 4885 if (!defined $stat); 4886 my ($stat_next) = ctx_statement_block($line_nr_next, 4887 $remain_next, $off_next); 4888 $stat_next =~ s/\n./\n /g; 4889 ##print "stat<$stat> stat_next<$stat_next>\n"; 4890 4891 if ($stat_next =~ /^\s*while\b/) { 4892 # If the statement carries leading newlines, 4893 # then count those as offsets. 4894 my ($whitespace) = 4895 ($stat_next =~ /^((?:\s*\n[+-])*\s*)/s); 4896 my $offset = 4897 statement_rawlines($whitespace) - 1; 4898 4899 $suppress_whiletrailers{$line_nr_next + 4900 $offset} = 1; 4901 } 4902 } 4903 if (!defined $suppress_whiletrailers{$linenr} && 4904 defined($stat) && defined($cond) && 4905 $line =~ /\b(?:if|while|for)\s*\(/ && $line !~ /^.\s*#/) { 4906 my ($s, $c) = ($stat, $cond); 4907 4908 if ($c =~ /\bif\s*\(.*[^<>!=]=[^=].*/s) { 4909 ERROR("ASSIGN_IN_IF", 4910 "do not use assignment in if condition\n" . $herecurr); 4911 } 4912 4913 # Find out what is on the end of the line after the 4914 # conditional. 4915 substr($s, 0, length($c), ''); 4916 $s =~ s/\n.*//g; 4917 $s =~ s/$;//g; # Remove any comments 4918 if (length($c) && $s !~ /^\s*{?\s*\\*\s*$/ && 4919 $c !~ /}\s*while\s*/) 4920 { 4921 # Find out how long the conditional actually is. 4922 my @newlines = ($c =~ /\n/gs); 4923 my $cond_lines = 1 + $#newlines; 4924 my $stat_real = ''; 4925 4926 $stat_real = raw_line($linenr, $cond_lines) 4927 . "\n" if ($cond_lines); 4928 if (defined($stat_real) && $cond_lines > 1) { 4929 $stat_real = "[...]\n$stat_real"; 4930 } 4931 4932 ERROR("TRAILING_STATEMENTS", 4933 "trailing statements should be on next line\n" . $herecurr . $stat_real); 4934 } 4935 } 4936 4937# Check for bitwise tests written as boolean 4938 if ($line =~ / 4939 (?: 4940 (?:\[|\(|\&\&|\|\|) 4941 \s*0[xX][0-9]+\s* 4942 (?:\&\&|\|\|) 4943 | 4944 (?:\&\&|\|\|) 4945 \s*0[xX][0-9]+\s* 4946 (?:\&\&|\|\||\)|\]) 4947 )/x) 4948 { 4949 WARN("HEXADECIMAL_BOOLEAN_TEST", 4950 "boolean test with hexadecimal, perhaps just 1 \& or \|?\n" . $herecurr); 4951 } 4952 4953# if and else should not have general statements after it 4954 if ($line =~ /^.\s*(?:}\s*)?else\b(.*)/) { 4955 my $s = $1; 4956 $s =~ s/$;//g; # Remove any comments 4957 if ($s !~ /^\s*(?:\sif|(?:{|)\s*\\?\s*$)/) { 4958 ERROR("TRAILING_STATEMENTS", 4959 "trailing statements should be on next line\n" . $herecurr); 4960 } 4961 } 4962# if should not continue a brace 4963 if ($line =~ /}\s*if\b/) { 4964 ERROR("TRAILING_STATEMENTS", 4965 "trailing statements should be on next line (or did you mean 'else if'?)\n" . 4966 $herecurr); 4967 } 4968# case and default should not have general statements after them 4969 if ($line =~ /^.\s*(?:case\s*.*|default\s*):/g && 4970 $line !~ /\G(?: 4971 (?:\s*$;*)(?:\s*{)?(?:\s*$;*)(?:\s*\\)?\s*$| 4972 \s*return\s+ 4973 )/xg) 4974 { 4975 ERROR("TRAILING_STATEMENTS", 4976 "trailing statements should be on next line\n" . $herecurr); 4977 } 4978 4979 # Check for }<nl>else {, these must be at the same 4980 # indent level to be relevant to each other. 4981 if ($prevline=~/}\s*$/ and $line=~/^.\s*else\s*/ && 4982 $previndent == $indent) { 4983 if (ERROR("ELSE_AFTER_BRACE", 4984 "else should follow close brace '}'\n" . $hereprev) && 4985 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { 4986 fix_delete_line($fixlinenr - 1, $prevrawline); 4987 fix_delete_line($fixlinenr, $rawline); 4988 my $fixedline = $prevrawline; 4989 $fixedline =~ s/}\s*$//; 4990 if ($fixedline !~ /^\+\s*$/) { 4991 fix_insert_line($fixlinenr, $fixedline); 4992 } 4993 $fixedline = $rawline; 4994 $fixedline =~ s/^(.\s*)else/$1} else/; 4995 fix_insert_line($fixlinenr, $fixedline); 4996 } 4997 } 4998 4999 if ($prevline=~/}\s*$/ and $line=~/^.\s*while\s*/ && 5000 $previndent == $indent) { 5001 my ($s, $c) = ctx_statement_block($linenr, $realcnt, 0); 5002 5003 # Find out what is on the end of the line after the 5004 # conditional. 5005 substr($s, 0, length($c), ''); 5006 $s =~ s/\n.*//g; 5007 5008 if ($s =~ /^\s*;/) { 5009 if (ERROR("WHILE_AFTER_BRACE", 5010 "while should follow close brace '}'\n" . $hereprev) && 5011 $fix && $prevline =~ /^\+/ && $line =~ /^\+/) { 5012 fix_delete_line($fixlinenr - 1, $prevrawline); 5013 fix_delete_line($fixlinenr, $rawline); 5014 my $fixedline = $prevrawline; 5015 my $trailing = $rawline; 5016 $trailing =~ s/^\+//; 5017 $trailing = trim($trailing); 5018 $fixedline =~ s/}\s*$/} $trailing/; 5019 fix_insert_line($fixlinenr, $fixedline); 5020 } 5021 } 5022 } 5023 5024#Specific variable tests 5025 while ($line =~ m{($Constant|$Lval)}g) { 5026 my $var = $1; 5027 5028#CamelCase 5029 if ($var !~ /^$Constant$/ && 5030 $var =~ /[A-Z][a-z]|[a-z][A-Z]/ && 5031#Ignore Page<foo> variants 5032 $var !~ /^(?:Clear|Set|TestClear|TestSet|)Page[A-Z]/ && 5033#Ignore SI style variants like nS, mV and dB (ie: max_uV, regulator_min_uA_show) 5034 $var !~ /^(?:[a-z_]*?)_?[a-z][A-Z](?:_[a-z_]+)?$/ && 5035#Ignore some three character SI units explicitly, like MiB and KHz 5036 $var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) { 5037 while ($var =~ m{($Ident)}g) { 5038 my $word = $1; 5039 next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/); 5040 if ($check) { 5041 seed_camelcase_includes(); 5042 if (!$file && !$camelcase_file_seeded) { 5043 seed_camelcase_file($realfile); 5044 $camelcase_file_seeded = 1; 5045 } 5046 } 5047 if (!defined $camelcase{$word}) { 5048 $camelcase{$word} = 1; 5049 CHK("CAMELCASE", 5050 "Avoid CamelCase: <$word>\n" . $herecurr); 5051 } 5052 } 5053 } 5054 } 5055 5056#no spaces allowed after \ in define 5057 if ($line =~ /\#\s*define.*\\\s+$/) { 5058 if (WARN("WHITESPACE_AFTER_LINE_CONTINUATION", 5059 "Whitespace after \\ makes next lines useless\n" . $herecurr) && 5060 $fix) { 5061 $fixed[$fixlinenr] =~ s/\s+$//; 5062 } 5063 } 5064 5065# warn if <asm/foo.h> is #included and <linux/foo.h> is available and includes 5066# itself <asm/foo.h> (uses RAW line) 5067 if ($tree && $rawline =~ m{^.\s*\#\s*include\s*\<asm\/(.*)\.h\>}) { 5068 my $file = "$1.h"; 5069 my $checkfile = "include/linux/$file"; 5070 if (-f "$root/$checkfile" && 5071 $realfile ne $checkfile && 5072 $1 !~ /$allowed_asm_includes/) 5073 { 5074 my $asminclude = `grep -Ec "#include\\s+<asm/$file>" $root/$checkfile`; 5075 if ($asminclude > 0) { 5076 if ($realfile =~ m{^arch/}) { 5077 CHK("ARCH_INCLUDE_LINUX", 5078 "Consider using #include <linux/$file> instead of <asm/$file>\n" . $herecurr); 5079 } else { 5080 WARN("INCLUDE_LINUX", 5081 "Use #include <linux/$file> instead of <asm/$file>\n" . $herecurr); 5082 } 5083 } 5084 } 5085 } 5086 5087# multi-statement macros should be enclosed in a do while loop, grab the 5088# first statement and ensure its the whole macro if its not enclosed 5089# in a known good container 5090 if ($realfile !~ m@/vmlinux.lds.h$@ && 5091 $line =~ /^.\s*\#\s*define\s*$Ident(\()?/) { 5092 my $ln = $linenr; 5093 my $cnt = $realcnt; 5094 my ($off, $dstat, $dcond, $rest); 5095 my $ctx = ''; 5096 my $has_flow_statement = 0; 5097 my $has_arg_concat = 0; 5098 ($dstat, $dcond, $ln, $cnt, $off) = 5099 ctx_statement_block($linenr, $realcnt, 0); 5100 $ctx = $dstat; 5101 #print "dstat<$dstat> dcond<$dcond> cnt<$cnt> off<$off>\n"; 5102 #print "LINE<$lines[$ln-1]> len<" . length($lines[$ln-1]) . "\n"; 5103 5104 $has_flow_statement = 1 if ($ctx =~ /\b(goto|return)\b/); 5105 $has_arg_concat = 1 if ($ctx =~ /\#\#/ && $ctx !~ /\#\#\s*(?:__VA_ARGS__|args)\b/); 5106 5107 $dstat =~ s/^.\s*\#\s*define\s+$Ident(\([^\)]*\))?\s*//; 5108 my $define_args = $1; 5109 my $define_stmt = $dstat; 5110 my @def_args = (); 5111 5112 if (defined $define_args && $define_args ne "") { 5113 $define_args = substr($define_args, 1, length($define_args) - 2); 5114 $define_args =~ s/\s*//g; 5115 $define_args =~ s/\\\+?//g; 5116 @def_args = split(",", $define_args); 5117 } 5118 5119 $dstat =~ s/$;//g; 5120 $dstat =~ s/\\\n.//g; 5121 $dstat =~ s/^\s*//s; 5122 $dstat =~ s/\s*$//s; 5123 5124 # Flatten any parentheses and braces 5125 while ($dstat =~ s/\([^\(\)]*\)/1/ || 5126 $dstat =~ s/\{[^\{\}]*\}/1/ || 5127 $dstat =~ s/.\[[^\[\]]*\]/1/) 5128 { 5129 } 5130 5131 # Flatten any obvious string concatentation. 5132 while ($dstat =~ s/($String)\s*$Ident/$1/ || 5133 $dstat =~ s/$Ident\s*($String)/$1/) 5134 { 5135 } 5136 5137 # Make asm volatile uses seem like a generic function 5138 $dstat =~ s/\b_*asm_*\s+_*volatile_*\b/asm_volatile/g; 5139 5140 my $exceptions = qr{ 5141 $Declare| 5142 module_param_named| 5143 MODULE_PARM_DESC| 5144 DECLARE_PER_CPU| 5145 DEFINE_PER_CPU| 5146 __typeof__\(| 5147 union| 5148 struct| 5149 \.$Ident\s*=\s*| 5150 ^\"|\"$| 5151 ^\[ 5152 }x; 5153 #print "REST<$rest> dstat<$dstat> ctx<$ctx>\n"; 5154 5155 $ctx =~ s/\n*$//; 5156 my $stmt_cnt = statement_rawlines($ctx); 5157 my $herectx = get_stat_here($linenr, $stmt_cnt, $here); 5158 5159 if ($dstat ne '' && 5160 $dstat !~ /^(?:$Ident|-?$Constant),$/ && # 10, // foo(), 5161 $dstat !~ /^(?:$Ident|-?$Constant);$/ && # foo(); 5162 $dstat !~ /^[!~-]?(?:$Lval|$Constant)$/ && # 10 // foo() // !foo // ~foo // -foo // foo->bar // foo.bar->baz 5163 $dstat !~ /^'X'$/ && $dstat !~ /^'XX'$/ && # character constants 5164 $dstat !~ /$exceptions/ && 5165 $dstat !~ /^\.$Ident\s*=/ && # .foo = 5166 $dstat !~ /^(?:\#\s*$Ident|\#\s*$Constant)\s*$/ && # stringification #foo 5167 $dstat !~ /^do\s*$Constant\s*while\s*$Constant;?$/ && # do {...} while (...); // do {...} while (...) 5168 $dstat !~ /^for\s*$Constant$/ && # for (...) 5169 $dstat !~ /^for\s*$Constant\s+(?:$Ident|-?$Constant)$/ && # for (...) bar() 5170 $dstat !~ /^do\s*{/ && # do {... 5171 $dstat !~ /^\(\{/ && # ({... 5172 $ctx !~ /^.\s*#\s*define\s+TRACE_(?:SYSTEM|INCLUDE_FILE|INCLUDE_PATH)\b/) 5173 { 5174 if ($dstat =~ /^\s*if\b/) { 5175 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE", 5176 "Macros starting with if should be enclosed by a do - while loop to avoid possible if/else logic defects\n" . "$herectx"); 5177 } elsif ($dstat =~ /;/) { 5178 ERROR("MULTISTATEMENT_MACRO_USE_DO_WHILE", 5179 "Macros with multiple statements should be enclosed in a do - while loop\n" . "$herectx"); 5180 } else { 5181 ERROR("COMPLEX_MACRO", 5182 "Macros with complex values should be enclosed in parentheses\n" . "$herectx"); 5183 } 5184 5185 } 5186 5187 # Make $define_stmt single line, comment-free, etc 5188 my @stmt_array = split('\n', $define_stmt); 5189 my $first = 1; 5190 $define_stmt = ""; 5191 foreach my $l (@stmt_array) { 5192 $l =~ s/\\$//; 5193 if ($first) { 5194 $define_stmt = $l; 5195 $first = 0; 5196 } elsif ($l =~ /^[\+ ]/) { 5197 $define_stmt .= substr($l, 1); 5198 } 5199 } 5200 $define_stmt =~ s/$;//g; 5201 $define_stmt =~ s/\s+/ /g; 5202 $define_stmt = trim($define_stmt); 5203 5204# check if any macro arguments are reused (ignore '...' and 'type') 5205 foreach my $arg (@def_args) { 5206 next if ($arg =~ /\.\.\./); 5207 next if ($arg =~ /^type$/i); 5208 my $tmp_stmt = $define_stmt; 5209 $tmp_stmt =~ s/\b(sizeof|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g; 5210 $tmp_stmt =~ s/\#+\s*$arg\b//g; 5211 $tmp_stmt =~ s/\b$arg\s*\#\#//g; 5212 my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g; 5213 if ($use_cnt > 1) { 5214 CHK("MACRO_ARG_REUSE", 5215 "Macro argument reuse '$arg' - possible side-effects?\n" . "$herectx"); 5216 } 5217# check if any macro arguments may have other precedence issues 5218 if ($tmp_stmt =~ m/($Operators)?\s*\b$arg\b\s*($Operators)?/m && 5219 ((defined($1) && $1 ne ',') || 5220 (defined($2) && $2 ne ','))) { 5221 CHK("MACRO_ARG_PRECEDENCE", 5222 "Macro argument '$arg' may be better as '($arg)' to avoid precedence issues\n" . "$herectx"); 5223 } 5224 } 5225 5226# check for macros with flow control, but without ## concatenation 5227# ## concatenation is commonly a macro that defines a function so ignore those 5228 if ($has_flow_statement && !$has_arg_concat) { 5229 my $cnt = statement_rawlines($ctx); 5230 my $herectx = get_stat_here($linenr, $cnt, $here); 5231 5232 WARN("MACRO_WITH_FLOW_CONTROL", 5233 "Macros with flow control statements should be avoided\n" . "$herectx"); 5234 } 5235 5236# check for line continuations outside of #defines, preprocessor #, and asm 5237 5238 } else { 5239 if ($prevline !~ /^..*\\$/ && 5240 $line !~ /^\+\s*\#.*\\$/ && # preprocessor 5241 $line !~ /^\+.*\b(__asm__|asm)\b.*\\$/ && # asm 5242 $line =~ /^\+.*\\$/) { 5243 WARN("LINE_CONTINUATIONS", 5244 "Avoid unnecessary line continuations\n" . $herecurr); 5245 } 5246 } 5247 5248# do {} while (0) macro tests: 5249# single-statement macros do not need to be enclosed in do while (0) loop, 5250# macro should not end with a semicolon 5251 if ($perl_version_ok && 5252 $realfile !~ m@/vmlinux.lds.h$@ && 5253 $line =~ /^.\s*\#\s*define\s+$Ident(\()?/) { 5254 my $ln = $linenr; 5255 my $cnt = $realcnt; 5256 my ($off, $dstat, $dcond, $rest); 5257 my $ctx = ''; 5258 ($dstat, $dcond, $ln, $cnt, $off) = 5259 ctx_statement_block($linenr, $realcnt, 0); 5260 $ctx = $dstat; 5261 5262 $dstat =~ s/\\\n.//g; 5263 $dstat =~ s/$;/ /g; 5264 5265 if ($dstat =~ /^\+\s*#\s*define\s+$Ident\s*${balanced_parens}\s*do\s*{(.*)\s*}\s*while\s*\(\s*0\s*\)\s*([;\s]*)\s*$/) { 5266 my $stmts = $2; 5267 my $semis = $3; 5268 5269 $ctx =~ s/\n*$//; 5270 my $cnt = statement_rawlines($ctx); 5271 my $herectx = get_stat_here($linenr, $cnt, $here); 5272 5273 if (($stmts =~ tr/;/;/) == 1 && 5274 $stmts !~ /^\s*(if|while|for|switch)\b/) { 5275 WARN("SINGLE_STATEMENT_DO_WHILE_MACRO", 5276 "Single statement macros should not use a do {} while (0) loop\n" . "$herectx"); 5277 } 5278 if (defined $semis && $semis ne "") { 5279 WARN("DO_WHILE_MACRO_WITH_TRAILING_SEMICOLON", 5280 "do {} while (0) macros should not be semicolon terminated\n" . "$herectx"); 5281 } 5282 } elsif ($dstat =~ /^\+\s*#\s*define\s+$Ident.*;\s*$/) { 5283 $ctx =~ s/\n*$//; 5284 my $cnt = statement_rawlines($ctx); 5285 my $herectx = get_stat_here($linenr, $cnt, $here); 5286 5287 WARN("TRAILING_SEMICOLON", 5288 "macros should not use a trailing semicolon\n" . "$herectx"); 5289 } 5290 } 5291 5292# check for redundant bracing round if etc 5293 if ($line =~ /(^.*)\bif\b/ && $1 !~ /else\s*$/) { 5294 my ($level, $endln, @chunks) = 5295 ctx_statement_full($linenr, $realcnt, 1); 5296 #print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n"; 5297 #print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n"; 5298 if ($#chunks > 0 && $level == 0) { 5299 my @allowed = (); 5300 my $allow = 0; 5301 my $seen = 0; 5302 my $herectx = $here . "\n"; 5303 my $ln = $linenr - 1; 5304 for my $chunk (@chunks) { 5305 my ($cond, $block) = @{$chunk}; 5306 5307 # If the condition carries leading newlines, then count those as offsets. 5308 my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s); 5309 my $offset = statement_rawlines($whitespace) - 1; 5310 5311 $allowed[$allow] = 0; 5312 #print "COND<$cond> whitespace<$whitespace> offset<$offset>\n"; 5313 5314 # We have looked at and allowed this specific line. 5315 $suppress_ifbraces{$ln + $offset} = 1; 5316 5317 $herectx .= "$rawlines[$ln + $offset]\n[...]\n"; 5318 $ln += statement_rawlines($block) - 1; 5319 5320 substr($block, 0, length($cond), ''); 5321 5322 $seen++ if ($block =~ /^\s*{/); 5323 5324 #print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n"; 5325 if (statement_lines($cond) > 1) { 5326 #print "APW: ALLOWED: cond<$cond>\n"; 5327 $allowed[$allow] = 1; 5328 } 5329 if ($block =~/\b(?:if|for|while)\b/) { 5330 #print "APW: ALLOWED: block<$block>\n"; 5331 $allowed[$allow] = 1; 5332 } 5333 if (statement_block_size($block) > 1) { 5334 #print "APW: ALLOWED: lines block<$block>\n"; 5335 $allowed[$allow] = 1; 5336 } 5337 $allow++; 5338 } 5339 if ($seen) { 5340 my $sum_allowed = 0; 5341 foreach (@allowed) { 5342 $sum_allowed += $_; 5343 } 5344 if ($sum_allowed == 0) { 5345 WARN("BRACES", 5346 "braces {} are not necessary for any arm of this statement\n" . $herectx); 5347 } elsif ($sum_allowed != $allow && 5348 $seen != $allow) { 5349 CHK("BRACES", 5350 "braces {} should be used on all arms of this statement\n" . $herectx); 5351 } 5352 } 5353 } 5354 } 5355 if (!defined $suppress_ifbraces{$linenr - 1} && 5356 $line =~ /\b(if|while|for|else)\b/) { 5357 my $allowed = 0; 5358 5359 # Check the pre-context. 5360 if (substr($line, 0, $-[0]) =~ /(\}\s*)$/) { 5361 #print "APW: ALLOWED: pre<$1>\n"; 5362 $allowed = 1; 5363 } 5364 5365 my ($level, $endln, @chunks) = 5366 ctx_statement_full($linenr, $realcnt, $-[0]); 5367 5368 # Check the condition. 5369 my ($cond, $block) = @{$chunks[0]}; 5370 #print "CHECKING<$linenr> cond<$cond> block<$block>\n"; 5371 if (defined $cond) { 5372 substr($block, 0, length($cond), ''); 5373 } 5374 if (statement_lines($cond) > 1) { 5375 #print "APW: ALLOWED: cond<$cond>\n"; 5376 $allowed = 1; 5377 } 5378 if ($block =~/\b(?:if|for|while)\b/) { 5379 #print "APW: ALLOWED: block<$block>\n"; 5380 $allowed = 1; 5381 } 5382 if (statement_block_size($block) > 1) { 5383 #print "APW: ALLOWED: lines block<$block>\n"; 5384 $allowed = 1; 5385 } 5386 # Check the post-context. 5387 if (defined $chunks[1]) { 5388 my ($cond, $block) = @{$chunks[1]}; 5389 if (defined $cond) { 5390 substr($block, 0, length($cond), ''); 5391 } 5392 if ($block =~ /^\s*\{/) { 5393 #print "APW: ALLOWED: chunk-1 block<$block>\n"; 5394 $allowed = 1; 5395 } 5396 } 5397 if ($level == 0 && $block =~ /^\s*\{/ && !$allowed) { 5398 my $cnt = statement_rawlines($block); 5399 my $herectx = get_stat_here($linenr, $cnt, $here); 5400 5401 WARN("BRACES", 5402 "braces {} are not necessary for single statement blocks\n" . $herectx); 5403 } 5404 } 5405 5406# check for single line unbalanced braces 5407 if ($sline =~ /^.\s*\}\s*else\s*$/ || 5408 $sline =~ /^.\s*else\s*\{\s*$/) { 5409 CHK("BRACES", "Unbalanced braces around else statement\n" . $herecurr); 5410 } 5411 5412# check for unnecessary blank lines around braces 5413 if (($line =~ /^.\s*}\s*$/ && $prevrawline =~ /^.\s*$/)) { 5414 if (CHK("BRACES", 5415 "Blank lines aren't necessary before a close brace '}'\n" . $hereprev) && 5416 $fix && $prevrawline =~ /^\+/) { 5417 fix_delete_line($fixlinenr - 1, $prevrawline); 5418 } 5419 } 5420 if (($rawline =~ /^.\s*$/ && $prevline =~ /^..*{\s*$/)) { 5421 if (CHK("BRACES", 5422 "Blank lines aren't necessary after an open brace '{'\n" . $hereprev) && 5423 $fix) { 5424 fix_delete_line($fixlinenr, $rawline); 5425 } 5426 } 5427 5428# no volatiles please 5429 my $asm_volatile = qr{\b(__asm__|asm)\s+(__volatile__|volatile)\b}; 5430 if ($line =~ /\bvolatile\b/ && $line !~ /$asm_volatile/) { 5431 WARN("VOLATILE", 5432 "Use of volatile is usually wrong: see Documentation/process/volatile-considered-harmful.rst\n" . $herecurr); 5433 } 5434 5435# Check for user-visible strings broken across lines, which breaks the ability 5436# to grep for the string. Make exceptions when the previous string ends in a 5437# newline (multiple lines in one string constant) or '\t', '\r', ';', or '{' 5438# (common in inline assembly) or is a octal \123 or hexadecimal \xaf value 5439 if ($line =~ /^\+\s*$String/ && 5440 $prevline =~ /"\s*$/ && 5441 $prevrawline !~ /(?:\\(?:[ntr]|[0-7]{1,3}|x[0-9a-fA-F]{1,2})|;\s*|\{\s*)"\s*$/) { 5442 if (WARN("SPLIT_STRING", 5443 "quoted string split across lines\n" . $hereprev) && 5444 $fix && 5445 $prevrawline =~ /^\+.*"\s*$/ && 5446 $last_coalesced_string_linenr != $linenr - 1) { 5447 my $extracted_string = get_quoted_string($line, $rawline); 5448 my $comma_close = ""; 5449 if ($rawline =~ /\Q$extracted_string\E(\s*\)\s*;\s*$|\s*,\s*)/) { 5450 $comma_close = $1; 5451 } 5452 5453 fix_delete_line($fixlinenr - 1, $prevrawline); 5454 fix_delete_line($fixlinenr, $rawline); 5455 my $fixedline = $prevrawline; 5456 $fixedline =~ s/"\s*$//; 5457 $fixedline .= substr($extracted_string, 1) . trim($comma_close); 5458 fix_insert_line($fixlinenr - 1, $fixedline); 5459 $fixedline = $rawline; 5460 $fixedline =~ s/\Q$extracted_string\E\Q$comma_close\E//; 5461 if ($fixedline !~ /\+\s*$/) { 5462 fix_insert_line($fixlinenr, $fixedline); 5463 } 5464 $last_coalesced_string_linenr = $linenr; 5465 } 5466 } 5467 5468# check for missing a space in a string concatenation 5469 if ($prevrawline =~ /[^\\]\w"$/ && $rawline =~ /^\+[\t ]+"\w/) { 5470 WARN('MISSING_SPACE', 5471 "break quoted strings at a space character\n" . $hereprev); 5472 } 5473 5474# check for an embedded function name in a string when the function is known 5475# This does not work very well for -f --file checking as it depends on patch 5476# context providing the function name or a single line form for in-file 5477# function declarations 5478 if ($line =~ /^\+.*$String/ && 5479 defined($context_function) && 5480 get_quoted_string($line, $rawline) =~ /\b$context_function\b/ && 5481 length(get_quoted_string($line, $rawline)) != (length($context_function) + 2)) { 5482 WARN("EMBEDDED_FUNCTION_NAME", 5483 "Prefer using '\"%s...\", __func__' to using '$context_function', this function's name, in a string\n" . $herecurr); 5484 } 5485 5486# check for spaces before a quoted newline 5487 if ($rawline =~ /^.*\".*\s\\n/) { 5488 if (WARN("QUOTED_WHITESPACE_BEFORE_NEWLINE", 5489 "unnecessary whitespace before a quoted newline\n" . $herecurr) && 5490 $fix) { 5491 $fixed[$fixlinenr] =~ s/^(\+.*\".*)\s+\\n/$1\\n/; 5492 } 5493 5494 } 5495 5496# concatenated string without spaces between elements 5497 if ($line =~ /$String[A-Za-z0-9_]/ || $line =~ /[A-Za-z0-9_]$String/) { 5498 if (CHK("CONCATENATED_STRING", 5499 "Concatenated strings should use spaces between elements\n" . $herecurr) && 5500 $fix) { 5501 while ($line =~ /($String)/g) { 5502 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]); 5503 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E([A-Za-z0-9_])/$extracted_string $1/; 5504 $fixed[$fixlinenr] =~ s/([A-Za-z0-9_])\Q$extracted_string\E/$1 $extracted_string/; 5505 } 5506 } 5507 } 5508 5509# uncoalesced string fragments 5510 if ($line =~ /$String\s*"/) { 5511 if (WARN("STRING_FRAGMENTS", 5512 "Consecutive strings are generally better as a single string\n" . $herecurr) && 5513 $fix) { 5514 while ($line =~ /($String)(?=\s*")/g) { 5515 my $extracted_string = substr($rawline, $-[0], $+[0] - $-[0]); 5516 $fixed[$fixlinenr] =~ s/\Q$extracted_string\E\s*"/substr($extracted_string, 0, -1)/e; 5517 } 5518 } 5519 } 5520 5521# check for non-standard and hex prefixed decimal printf formats 5522 my $show_L = 1; #don't show the same defect twice 5523 my $show_Z = 1; 5524 while ($line =~ /(?:^|")([X\t]*)(?:"|$)/g) { 5525 my $string = substr($rawline, $-[1], $+[1] - $-[1]); 5526 $string =~ s/%%/__/g; 5527 # check for %L 5528 if ($show_L && $string =~ /%[\*\d\.\$]*L([diouxX])/) { 5529 WARN("PRINTF_L", 5530 "\%L$1 is non-standard C, use %ll$1\n" . $herecurr); 5531 $show_L = 0; 5532 } 5533 # check for %Z 5534 if ($show_Z && $string =~ /%[\*\d\.\$]*Z([diouxX])/) { 5535 WARN("PRINTF_Z", 5536 "%Z$1 is non-standard C, use %z$1\n" . $herecurr); 5537 $show_Z = 0; 5538 } 5539 # check for 0x<decimal> 5540 if ($string =~ /0x%[\*\d\.\$\Llzth]*[diou]/) { 5541 ERROR("PRINTF_0XDECIMAL", 5542 "Prefixing 0x with decimal output is defective\n" . $herecurr); 5543 } 5544 } 5545 5546# check for line continuations in quoted strings with odd counts of " 5547 if ($rawline =~ /\\$/ && $sline =~ tr/"/"/ % 2) { 5548 WARN("LINE_CONTINUATIONS", 5549 "Avoid line continuations in quoted strings\n" . $herecurr); 5550 } 5551 5552# warn about #if 0 5553 if ($line =~ /^.\s*\#\s*if\s+0\b/) { 5554 WARN("IF_0", 5555 "Consider removing the code enclosed by this #if 0 and its #endif\n" . $herecurr); 5556 } 5557 5558# warn about #if 1 5559 if ($line =~ /^.\s*\#\s*if\s+1\b/) { 5560 WARN("IF_1", 5561 "Consider removing the #if 1 and its #endif\n" . $herecurr); 5562 } 5563 5564# check for needless "if (<foo>) fn(<foo>)" uses 5565 if ($prevline =~ /\bif\s*\(\s*($Lval)\s*\)/) { 5566 my $tested = quotemeta($1); 5567 my $expr = '\s*\(\s*' . $tested . '\s*\)\s*;'; 5568 if ($line =~ /\b(kfree|usb_free_urb|debugfs_remove(?:_recursive)?|(?:kmem_cache|mempool|dma_pool)_destroy)$expr/) { 5569 my $func = $1; 5570 if (WARN('NEEDLESS_IF', 5571 "$func(NULL) is safe and this check is probably not required\n" . $hereprev) && 5572 $fix) { 5573 my $do_fix = 1; 5574 my $leading_tabs = ""; 5575 my $new_leading_tabs = ""; 5576 if ($lines[$linenr - 2] =~ /^\+(\t*)if\s*\(\s*$tested\s*\)\s*$/) { 5577 $leading_tabs = $1; 5578 } else { 5579 $do_fix = 0; 5580 } 5581 if ($lines[$linenr - 1] =~ /^\+(\t+)$func\s*\(\s*$tested\s*\)\s*;\s*$/) { 5582 $new_leading_tabs = $1; 5583 if (length($leading_tabs) + 1 ne length($new_leading_tabs)) { 5584 $do_fix = 0; 5585 } 5586 } else { 5587 $do_fix = 0; 5588 } 5589 if ($do_fix) { 5590 fix_delete_line($fixlinenr - 1, $prevrawline); 5591 $fixed[$fixlinenr] =~ s/^\+$new_leading_tabs/\+$leading_tabs/; 5592 } 5593 } 5594 } 5595 } 5596 5597# check for unnecessary "Out of Memory" messages 5598 if ($line =~ /^\+.*\b$logFunctions\s*\(/ && 5599 $prevline =~ /^[ \+]\s*if\s*\(\s*(\!\s*|NULL\s*==\s*)?($Lval)(\s*==\s*NULL\s*)?\s*\)/ && 5600 (defined $1 || defined $3) && 5601 $linenr > 3) { 5602 my $testval = $2; 5603 my $testline = $lines[$linenr - 3]; 5604 5605 my ($s, $c) = ctx_statement_block($linenr - 3, $realcnt, 0); 5606# print("line: <$line>\nprevline: <$prevline>\ns: <$s>\nc: <$c>\n\n\n"); 5607 5608 if ($s =~ /(?:^|\n)[ \+]\s*(?:$Type\s*)?\Q$testval\E\s*=\s*(?:\([^\)]*\)\s*)?\s*$allocFunctions\s*\(/ && 5609 $s !~ /\b__GFP_NOWARN\b/ ) { 5610 WARN("OOM_MESSAGE", 5611 "Possible unnecessary 'out of memory' message\n" . $hereprev); 5612 } 5613 } 5614 5615# check for logging functions with KERN_<LEVEL> 5616 if ($line !~ /printk(?:_ratelimited|_once)?\s*\(/ && 5617 $line =~ /\b$logFunctions\s*\(.*\b(KERN_[A-Z]+)\b/) { 5618 my $level = $1; 5619 if (WARN("UNNECESSARY_KERN_LEVEL", 5620 "Possible unnecessary $level\n" . $herecurr) && 5621 $fix) { 5622 $fixed[$fixlinenr] =~ s/\s*$level\s*//; 5623 } 5624 } 5625 5626# check for logging continuations 5627 if ($line =~ /\bprintk\s*\(\s*KERN_CONT\b|\bpr_cont\s*\(/) { 5628 WARN("LOGGING_CONTINUATION", 5629 "Avoid logging continuation uses where feasible\n" . $herecurr); 5630 } 5631 5632# check for mask then right shift without a parentheses 5633 if ($perl_version_ok && 5634 $line =~ /$LvalOrFunc\s*\&\s*($LvalOrFunc)\s*>>/ && 5635 $4 !~ /^\&/) { # $LvalOrFunc may be &foo, ignore if so 5636 WARN("MASK_THEN_SHIFT", 5637 "Possible precedence defect with mask then right shift - may need parentheses\n" . $herecurr); 5638 } 5639 5640# check for pointer comparisons to NULL 5641 if ($perl_version_ok) { 5642 while ($line =~ /\b$LvalOrFunc\s*(==|\!=)\s*NULL\b/g) { 5643 my $val = $1; 5644 my $equal = "!"; 5645 $equal = "" if ($4 eq "!="); 5646 if (CHK("COMPARISON_TO_NULL", 5647 "Comparison to NULL could be written \"${equal}${val}\"\n" . $herecurr) && 5648 $fix) { 5649 $fixed[$fixlinenr] =~ s/\b\Q$val\E\s*(?:==|\!=)\s*NULL\b/$equal$val/; 5650 } 5651 } 5652 } 5653 5654# check for bad placement of section $InitAttribute (e.g.: __initdata) 5655 if ($line =~ /(\b$InitAttribute\b)/) { 5656 my $attr = $1; 5657 if ($line =~ /^\+\s*static\s+(?:const\s+)?(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*[=;]/) { 5658 my $ptr = $1; 5659 my $var = $2; 5660 if ((($ptr =~ /\b(union|struct)\s+$attr\b/ && 5661 ERROR("MISPLACED_INIT", 5662 "$attr should be placed after $var\n" . $herecurr)) || 5663 ($ptr !~ /\b(union|struct)\s+$attr\b/ && 5664 WARN("MISPLACED_INIT", 5665 "$attr should be placed after $var\n" . $herecurr))) && 5666 $fix) { 5667 $fixed[$fixlinenr] =~ s/(\bstatic\s+(?:const\s+)?)(?:$attr\s+)?($NonptrTypeWithAttr)\s+(?:$attr\s+)?($Ident(?:\[[^]]*\])?)\s*([=;])\s*/"$1" . trim(string_find_replace($2, "\\s*$attr\\s*", " ")) . " " . trim(string_find_replace($3, "\\s*$attr\\s*", "")) . " $attr" . ("$4" eq ";" ? ";" : " = ")/e; 5668 } 5669 } 5670 } 5671 5672# check for $InitAttributeData (ie: __initdata) with const 5673 if ($line =~ /\bconst\b/ && $line =~ /($InitAttributeData)/) { 5674 my $attr = $1; 5675 $attr =~ /($InitAttributePrefix)(.*)/; 5676 my $attr_prefix = $1; 5677 my $attr_type = $2; 5678 if (ERROR("INIT_ATTRIBUTE", 5679 "Use of const init definition must use ${attr_prefix}initconst\n" . $herecurr) && 5680 $fix) { 5681 $fixed[$fixlinenr] =~ 5682 s/$InitAttributeData/${attr_prefix}initconst/; 5683 } 5684 } 5685 5686# check for $InitAttributeConst (ie: __initconst) without const 5687 if ($line !~ /\bconst\b/ && $line =~ /($InitAttributeConst)/) { 5688 my $attr = $1; 5689 if (ERROR("INIT_ATTRIBUTE", 5690 "Use of $attr requires a separate use of const\n" . $herecurr) && 5691 $fix) { 5692 my $lead = $fixed[$fixlinenr] =~ 5693 /(^\+\s*(?:static\s+))/; 5694 $lead = rtrim($1); 5695 $lead = "$lead " if ($lead !~ /^\+$/); 5696 $lead = "${lead}const "; 5697 $fixed[$fixlinenr] =~ s/(^\+\s*(?:static\s+))/$lead/; 5698 } 5699 } 5700 5701# check for __read_mostly with const non-pointer (should just be const) 5702 if ($line =~ /\b__read_mostly\b/ && 5703 $line =~ /($Type)\s*$Ident/ && $1 !~ /\*\s*$/ && $1 =~ /\bconst\b/) { 5704 if (ERROR("CONST_READ_MOSTLY", 5705 "Invalid use of __read_mostly with const type\n" . $herecurr) && 5706 $fix) { 5707 $fixed[$fixlinenr] =~ s/\s+__read_mostly\b//; 5708 } 5709 } 5710 5711# don't use __constant_<foo> functions outside of include/uapi/ 5712 if ($realfile !~ m@^include/uapi/@ && 5713 $line =~ /(__constant_(?:htons|ntohs|[bl]e(?:16|32|64)_to_cpu|cpu_to_[bl]e(?:16|32|64)))\s*\(/) { 5714 my $constant_func = $1; 5715 my $func = $constant_func; 5716 $func =~ s/^__constant_//; 5717 if (WARN("CONSTANT_CONVERSION", 5718 "$constant_func should be $func\n" . $herecurr) && 5719 $fix) { 5720 $fixed[$fixlinenr] =~ s/\b$constant_func\b/$func/g; 5721 } 5722 } 5723 5724# prefer usleep_range over udelay 5725 if ($line =~ /\budelay\s*\(\s*(\d+)\s*\)/) { 5726 my $delay = $1; 5727 # ignore udelay's < 10, however 5728 if (! ($delay < 10) ) { 5729 CHK("USLEEP_RANGE", 5730 "usleep_range is preferred over udelay; see Documentation/timers/timers-howto.rst\n" . $herecurr); 5731 } 5732 if ($delay > 2000) { 5733 WARN("LONG_UDELAY", 5734 "long udelay - prefer mdelay; see arch/arm/include/asm/delay.h\n" . $herecurr); 5735 } 5736 } 5737 5738# warn about unexpectedly long msleep's 5739 if ($line =~ /\bmsleep\s*\((\d+)\);/) { 5740 if ($1 < 20) { 5741 WARN("MSLEEP", 5742 "msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.rst\n" . $herecurr); 5743 } 5744 } 5745 5746# check for comparisons of jiffies 5747 if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) { 5748 WARN("JIFFIES_COMPARISON", 5749 "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr); 5750 } 5751 5752# check for comparisons of get_jiffies_64() 5753 if ($line =~ /\bget_jiffies_64\s*\(\s*\)\s*$Compare|$Compare\s*get_jiffies_64\s*\(\s*\)/) { 5754 WARN("JIFFIES_COMPARISON", 5755 "Comparing get_jiffies_64() is almost always wrong; prefer time_after64, time_before64 and friends\n" . $herecurr); 5756 } 5757 5758# warn about #ifdefs in C files 5759# if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) { 5760# print "#ifdef in C files should be avoided\n"; 5761# print "$herecurr"; 5762# $clean = 0; 5763# } 5764 5765# warn about spacing in #ifdefs 5766 if ($line =~ /^.\s*\#\s*(ifdef|ifndef|elif)\s\s+/) { 5767 if (ERROR("SPACING", 5768 "exactly one space required after that #$1\n" . $herecurr) && 5769 $fix) { 5770 $fixed[$fixlinenr] =~ 5771 s/^(.\s*\#\s*(ifdef|ifndef|elif))\s{2,}/$1 /; 5772 } 5773 5774 } 5775 5776# check for spinlock_t definitions without a comment. 5777 if ($line =~ /^.\s*(struct\s+mutex|spinlock_t)\s+\S+;/ || 5778 $line =~ /^.\s*(DEFINE_MUTEX)\s*\(/) { 5779 my $which = $1; 5780 if (!ctx_has_comment($first_line, $linenr)) { 5781 CHK("UNCOMMENTED_DEFINITION", 5782 "$1 definition without comment\n" . $herecurr); 5783 } 5784 } 5785# check for memory barriers without a comment. 5786 5787 my $barriers = qr{ 5788 mb| 5789 rmb| 5790 wmb| 5791 read_barrier_depends 5792 }x; 5793 my $barrier_stems = qr{ 5794 mb__before_atomic| 5795 mb__after_atomic| 5796 store_release| 5797 load_acquire| 5798 store_mb| 5799 (?:$barriers) 5800 }x; 5801 my $all_barriers = qr{ 5802 (?:$barriers)| 5803 smp_(?:$barrier_stems)| 5804 virt_(?:$barrier_stems) 5805 }x; 5806 5807 if ($line =~ /\b(?:$all_barriers)\s*\(/) { 5808 if (!ctx_has_comment($first_line, $linenr)) { 5809 WARN("MEMORY_BARRIER", 5810 "memory barrier without comment\n" . $herecurr); 5811 } 5812 } 5813 5814 my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x; 5815 5816 if ($realfile !~ m@^include/asm-generic/@ && 5817 $realfile !~ m@/barrier\.h$@ && 5818 $line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ && 5819 $line !~ m/^.\s*\#\s*define\s+(?:$underscore_smp_barriers)\s*\(/) { 5820 WARN("MEMORY_BARRIER", 5821 "__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr); 5822 } 5823 5824# check for waitqueue_active without a comment. 5825 if ($line =~ /\bwaitqueue_active\s*\(/) { 5826 if (!ctx_has_comment($first_line, $linenr)) { 5827 WARN("WAITQUEUE_ACTIVE", 5828 "waitqueue_active without comment\n" . $herecurr); 5829 } 5830 } 5831 5832# check for smp_read_barrier_depends and read_barrier_depends 5833 if (!$file && $line =~ /\b(smp_|)read_barrier_depends\s*\(/) { 5834 WARN("READ_BARRIER_DEPENDS", 5835 "$1read_barrier_depends should only be used in READ_ONCE or DEC Alpha code\n" . $herecurr); 5836 } 5837 5838# check of hardware specific defines 5839 if ($line =~ m@^.\s*\#\s*if.*\b(__i386__|__powerpc64__|__sun__|__s390x__)\b@ && $realfile !~ m@include/asm-@) { 5840 CHK("ARCH_DEFINES", 5841 "architecture specific defines should be avoided\n" . $herecurr); 5842 } 5843 5844# check that the storage class is not after a type 5845 if ($line =~ /\b($Type)\s+($Storage)\b/) { 5846 WARN("STORAGE_CLASS", 5847 "storage class '$2' should be located before type '$1'\n" . $herecurr); 5848 } 5849# Check that the storage class is at the beginning of a declaration 5850 if ($line =~ /\b$Storage\b/ && 5851 $line !~ /^.\s*$Storage/ && 5852 $line =~ /^.\s*(.+?)\$Storage\s/ && 5853 $1 !~ /[\,\)]\s*$/) { 5854 WARN("STORAGE_CLASS", 5855 "storage class should be at the beginning of the declaration\n" . $herecurr); 5856 } 5857 5858# check the location of the inline attribute, that it is between 5859# storage class and type. 5860 if ($line =~ /\b$Type\s+$Inline\b/ || 5861 $line =~ /\b$Inline\s+$Storage\b/) { 5862 ERROR("INLINE_LOCATION", 5863 "inline keyword should sit between storage class and type\n" . $herecurr); 5864 } 5865 5866# Check for __inline__ and __inline, prefer inline 5867 if ($realfile !~ m@\binclude/uapi/@ && 5868 $line =~ /\b(__inline__|__inline)\b/) { 5869 if (WARN("INLINE", 5870 "plain inline is preferred over $1\n" . $herecurr) && 5871 $fix) { 5872 $fixed[$fixlinenr] =~ s/\b(__inline__|__inline)\b/inline/; 5873 5874 } 5875 } 5876 5877# Check for __attribute__ packed, prefer __packed 5878 if ($realfile !~ m@\binclude/uapi/@ && 5879 $line =~ /\b__attribute__\s*\(\s*\(.*\bpacked\b/) { 5880 WARN("PREFER_PACKED", 5881 "__packed is preferred over __attribute__((packed))\n" . $herecurr); 5882 } 5883 5884# Check for __attribute__ aligned, prefer __aligned 5885 if ($realfile !~ m@\binclude/uapi/@ && 5886 $line =~ /\b__attribute__\s*\(\s*\(.*aligned/) { 5887 WARN("PREFER_ALIGNED", 5888 "__aligned(size) is preferred over __attribute__((aligned(size)))\n" . $herecurr); 5889 } 5890 5891# Check for __attribute__ section, prefer __section 5892 if ($realfile !~ m@\binclude/uapi/@ && 5893 $line =~ /\b__attribute__\s*\(\s*\(.*_*section_*\s*\(\s*("[^"]*")/) { 5894 my $old = substr($rawline, $-[1], $+[1] - $-[1]); 5895 my $new = substr($old, 1, -1); 5896 if (WARN("PREFER_SECTION", 5897 "__section($new) is preferred over __attribute__((section($old)))\n" . $herecurr) && 5898 $fix) { 5899 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*_*section_*\s*\(\s*\Q$old\E\s*\)\s*\)\s*\)/__section($new)/; 5900 } 5901 } 5902 5903# Check for __attribute__ format(printf, prefer __printf 5904 if ($realfile !~ m@\binclude/uapi/@ && 5905 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf/) { 5906 if (WARN("PREFER_PRINTF", 5907 "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr) && 5908 $fix) { 5909 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*printf\s*,\s*(.*)\)\s*\)\s*\)/"__printf(" . trim($1) . ")"/ex; 5910 5911 } 5912 } 5913 5914# Check for __attribute__ format(scanf, prefer __scanf 5915 if ($realfile !~ m@\binclude/uapi/@ && 5916 $line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) { 5917 if (WARN("PREFER_SCANF", 5918 "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr) && 5919 $fix) { 5920 $fixed[$fixlinenr] =~ s/\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\s*,\s*(.*)\)\s*\)\s*\)/"__scanf(" . trim($1) . ")"/ex; 5921 } 5922 } 5923 5924# Check for __attribute__ weak, or __weak declarations (may have link issues) 5925 if ($perl_version_ok && 5926 $line =~ /(?:$Declare|$DeclareMisordered)\s*$Ident\s*$balanced_parens\s*(?:$Attribute)?\s*;/ && 5927 ($line =~ /\b__attribute__\s*\(\s*\(.*\bweak\b/ || 5928 $line =~ /\b__weak\b/)) { 5929 ERROR("WEAK_DECLARATION", 5930 "Using weak declarations can have unintended link defects\n" . $herecurr); 5931 } 5932 5933# check for c99 types like uint8_t used outside of uapi/ and tools/ 5934 if ($realfile !~ m@\binclude/uapi/@ && 5935 $realfile !~ m@\btools/@ && 5936 $line =~ /\b($Declare)\s*$Ident\s*[=;,\[]/) { 5937 my $type = $1; 5938 if ($type =~ /\b($typeC99Typedefs)\b/) { 5939 $type = $1; 5940 my $kernel_type = 'u'; 5941 $kernel_type = 's' if ($type =~ /^_*[si]/); 5942 $type =~ /(\d+)/; 5943 $kernel_type .= $1; 5944 if (CHK("PREFER_KERNEL_TYPES", 5945 "Prefer kernel type '$kernel_type' over '$type'\n" . $herecurr) && 5946 $fix) { 5947 $fixed[$fixlinenr] =~ s/\b$type\b/$kernel_type/; 5948 } 5949 } 5950 } 5951 5952# check for cast of C90 native int or longer types constants 5953 if ($line =~ /(\(\s*$C90_int_types\s*\)\s*)($Constant)\b/) { 5954 my $cast = $1; 5955 my $const = $2; 5956 if (WARN("TYPECAST_INT_CONSTANT", 5957 "Unnecessary typecast of c90 int constant\n" . $herecurr) && 5958 $fix) { 5959 my $suffix = ""; 5960 my $newconst = $const; 5961 $newconst =~ s/${Int_type}$//; 5962 $suffix .= 'U' if ($cast =~ /\bunsigned\b/); 5963 if ($cast =~ /\blong\s+long\b/) { 5964 $suffix .= 'LL'; 5965 } elsif ($cast =~ /\blong\b/) { 5966 $suffix .= 'L'; 5967 } 5968 $fixed[$fixlinenr] =~ s/\Q$cast\E$const\b/$newconst$suffix/; 5969 } 5970 } 5971 5972# check for sizeof(&) 5973 if ($line =~ /\bsizeof\s*\(\s*\&/) { 5974 WARN("SIZEOF_ADDRESS", 5975 "sizeof(& should be avoided\n" . $herecurr); 5976 } 5977 5978# check for sizeof without parenthesis 5979 if ($line =~ /\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/) { 5980 if (WARN("SIZEOF_PARENTHESIS", 5981 "sizeof $1 should be sizeof($1)\n" . $herecurr) && 5982 $fix) { 5983 $fixed[$fixlinenr] =~ s/\bsizeof\s+((?:\*\s*|)$Lval|$Type(?:\s+$Lval|))/"sizeof(" . trim($1) . ")"/ex; 5984 } 5985 } 5986 5987# check for struct spinlock declarations 5988 if ($line =~ /^.\s*\bstruct\s+spinlock\s+\w+\s*;/) { 5989 WARN("USE_SPINLOCK_T", 5990 "struct spinlock should be spinlock_t\n" . $herecurr); 5991 } 5992 5993# check for seq_printf uses that could be seq_puts 5994 if ($sline =~ /\bseq_printf\s*\(.*"\s*\)\s*;\s*$/) { 5995 my $fmt = get_quoted_string($line, $rawline); 5996 $fmt =~ s/%%//g; 5997 if ($fmt !~ /%/) { 5998 if (WARN("PREFER_SEQ_PUTS", 5999 "Prefer seq_puts to seq_printf\n" . $herecurr) && 6000 $fix) { 6001 $fixed[$fixlinenr] =~ s/\bseq_printf\b/seq_puts/; 6002 } 6003 } 6004 } 6005 6006# check for vsprintf extension %p<foo> misuses 6007 if ($perl_version_ok && 6008 defined $stat && 6009 $stat =~ /^\+(?![^\{]*\{\s*).*\b(\w+)\s*\(.*$String\s*,/s && 6010 $1 !~ /^_*volatile_*$/) { 6011 my $stat_real; 6012 6013 my $lc = $stat =~ tr@\n@@; 6014 $lc = $lc + $linenr; 6015 for (my $count = $linenr; $count <= $lc; $count++) { 6016 my $specifier; 6017 my $extension; 6018 my $bad_specifier = ""; 6019 my $fmt = get_quoted_string($lines[$count - 1], raw_line($count, 0)); 6020 $fmt =~ s/%%//g; 6021 6022 while ($fmt =~ /(\%[\*\d\.]*p(\w))/g) { 6023 $specifier = $1; 6024 $extension = $2; 6025 if ($extension !~ /[SsBKRraEhMmIiUDdgVCbGNOxt]/) { 6026 $bad_specifier = $specifier; 6027 last; 6028 } 6029 if ($extension eq "x" && !defined($stat_real)) { 6030 if (!defined($stat_real)) { 6031 $stat_real = get_stat_real($linenr, $lc); 6032 } 6033 WARN("VSPRINTF_SPECIFIER_PX", 6034 "Using vsprintf specifier '\%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '\%p'.\n" . "$here\n$stat_real\n"); 6035 } 6036 } 6037 if ($bad_specifier ne "") { 6038 my $stat_real = get_stat_real($linenr, $lc); 6039 my $ext_type = "Invalid"; 6040 my $use = ""; 6041 if ($bad_specifier =~ /p[Ff]/) { 6042 $ext_type = "Deprecated"; 6043 $use = " - use %pS instead"; 6044 $use =~ s/pS/ps/ if ($bad_specifier =~ /pf/); 6045 } 6046 6047 WARN("VSPRINTF_POINTER_EXTENSION", 6048 "$ext_type vsprintf pointer extension '$bad_specifier'$use\n" . "$here\n$stat_real\n"); 6049 } 6050 } 6051 } 6052 6053# Check for misused memsets 6054 if ($perl_version_ok && 6055 defined $stat && 6056 $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*$FuncArg\s*\)/) { 6057 6058 my $ms_addr = $2; 6059 my $ms_val = $7; 6060 my $ms_size = $12; 6061 6062 if ($ms_size =~ /^(0x|)0$/i) { 6063 ERROR("MEMSET", 6064 "memset to 0's uses 0 as the 2nd argument, not the 3rd\n" . "$here\n$stat\n"); 6065 } elsif ($ms_size =~ /^(0x|)1$/i) { 6066 WARN("MEMSET", 6067 "single byte memset is suspicious. Swapped 2nd/3rd argument?\n" . "$here\n$stat\n"); 6068 } 6069 } 6070 6071# Check for memcpy(foo, bar, ETH_ALEN) that could be ether_addr_copy(foo, bar) 6072# if ($perl_version_ok && 6073# defined $stat && 6074# $stat =~ /^\+(?:.*?)\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) { 6075# if (WARN("PREFER_ETHER_ADDR_COPY", 6076# "Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)\n" . "$here\n$stat\n") && 6077# $fix) { 6078# $fixed[$fixlinenr] =~ s/\bmemcpy\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/ether_addr_copy($2, $7)/; 6079# } 6080# } 6081 6082# Check for memcmp(foo, bar, ETH_ALEN) that could be ether_addr_equal*(foo, bar) 6083# if ($perl_version_ok && 6084# defined $stat && 6085# $stat =~ /^\+(?:.*?)\bmemcmp\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) { 6086# WARN("PREFER_ETHER_ADDR_EQUAL", 6087# "Prefer ether_addr_equal() or ether_addr_equal_unaligned() over memcmp()\n" . "$here\n$stat\n") 6088# } 6089 6090# check for memset(foo, 0x0, ETH_ALEN) that could be eth_zero_addr 6091# check for memset(foo, 0xFF, ETH_ALEN) that could be eth_broadcast_addr 6092# if ($perl_version_ok && 6093# defined $stat && 6094# $stat =~ /^\+(?:.*?)\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\,\s*ETH_ALEN\s*\)/) { 6095# 6096# my $ms_val = $7; 6097# 6098# if ($ms_val =~ /^(?:0x|)0+$/i) { 6099# if (WARN("PREFER_ETH_ZERO_ADDR", 6100# "Prefer eth_zero_addr over memset()\n" . "$here\n$stat\n") && 6101# $fix) { 6102# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_zero_addr($2)/; 6103# } 6104# } elsif ($ms_val =~ /^(?:0xff|255)$/i) { 6105# if (WARN("PREFER_ETH_BROADCAST_ADDR", 6106# "Prefer eth_broadcast_addr() over memset()\n" . "$here\n$stat\n") && 6107# $fix) { 6108# $fixed[$fixlinenr] =~ s/\bmemset\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*,\s*ETH_ALEN\s*\)/eth_broadcast_addr($2)/; 6109# } 6110# } 6111# } 6112 6113# typecasts on min/max could be min_t/max_t 6114 if ($perl_version_ok && 6115 defined $stat && 6116 $stat =~ /^\+(?:.*?)\b(min|max)\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) { 6117 if (defined $2 || defined $7) { 6118 my $call = $1; 6119 my $cast1 = deparenthesize($2); 6120 my $arg1 = $3; 6121 my $cast2 = deparenthesize($7); 6122 my $arg2 = $8; 6123 my $cast; 6124 6125 if ($cast1 ne "" && $cast2 ne "" && $cast1 ne $cast2) { 6126 $cast = "$cast1 or $cast2"; 6127 } elsif ($cast1 ne "") { 6128 $cast = $cast1; 6129 } else { 6130 $cast = $cast2; 6131 } 6132 WARN("MINMAX", 6133 "$call() should probably be ${call}_t($cast, $arg1, $arg2)\n" . "$here\n$stat\n"); 6134 } 6135 } 6136 6137# check usleep_range arguments 6138 if ($perl_version_ok && 6139 defined $stat && 6140 $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) { 6141 my $min = $1; 6142 my $max = $7; 6143 if ($min eq $max) { 6144 WARN("USLEEP_RANGE", 6145 "usleep_range should not use min == max args; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n"); 6146 } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ && 6147 $min > $max) { 6148 WARN("USLEEP_RANGE", 6149 "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.rst\n" . "$here\n$stat\n"); 6150 } 6151 } 6152 6153# check for naked sscanf 6154 if ($perl_version_ok && 6155 defined $stat && 6156 $line =~ /\bsscanf\b/ && 6157 ($stat !~ /$Ident\s*=\s*sscanf\s*$balanced_parens/ && 6158 $stat !~ /\bsscanf\s*$balanced_parens\s*(?:$Compare)/ && 6159 $stat !~ /(?:$Compare)\s*\bsscanf\s*$balanced_parens/)) { 6160 my $lc = $stat =~ tr@\n@@; 6161 $lc = $lc + $linenr; 6162 my $stat_real = get_stat_real($linenr, $lc); 6163 WARN("NAKED_SSCANF", 6164 "unchecked sscanf return value\n" . "$here\n$stat_real\n"); 6165 } 6166 6167# check for simple sscanf that should be kstrto<foo> 6168 if ($perl_version_ok && 6169 defined $stat && 6170 $line =~ /\bsscanf\b/) { 6171 my $lc = $stat =~ tr@\n@@; 6172 $lc = $lc + $linenr; 6173 my $stat_real = get_stat_real($linenr, $lc); 6174 if ($stat_real =~ /\bsscanf\b\s*\(\s*$FuncArg\s*,\s*("[^"]+")/) { 6175 my $format = $6; 6176 my $count = $format =~ tr@%@%@; 6177 if ($count == 1 && 6178 $format =~ /^"\%(?i:ll[udxi]|[udxi]ll|ll|[hl]h?[udxi]|[udxi][hl]h?|[hl]h?|[udxi])"$/) { 6179 WARN("SSCANF_TO_KSTRTO", 6180 "Prefer kstrto<type> to single variable sscanf\n" . "$here\n$stat_real\n"); 6181 } 6182 } 6183 } 6184 6185# check for new externs in .h files. 6186 if ($realfile =~ /\.h$/ && 6187 $line =~ /^\+\s*(extern\s+)$Type\s*$Ident\s*\(/s) { 6188 if (CHK("AVOID_EXTERNS", 6189 "extern prototypes should be avoided in .h files\n" . $herecurr) && 6190 $fix) { 6191 $fixed[$fixlinenr] =~ s/(.*)\bextern\b\s*(.*)/$1$2/; 6192 } 6193 } 6194 6195# check for new externs in .c files. 6196 if ($realfile =~ /\.c$/ && defined $stat && 6197 $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s) 6198 { 6199 my $function_name = $1; 6200 my $paren_space = $2; 6201 6202 my $s = $stat; 6203 if (defined $cond) { 6204 substr($s, 0, length($cond), ''); 6205 } 6206 if ($s =~ /^\s*;/ && 6207 $function_name ne 'uninitialized_var') 6208 { 6209 WARN("AVOID_EXTERNS", 6210 "externs should be avoided in .c files\n" . $herecurr); 6211 } 6212 6213 if ($paren_space =~ /\n/) { 6214 WARN("FUNCTION_ARGUMENTS", 6215 "arguments for function declarations should follow identifier\n" . $herecurr); 6216 } 6217 6218 } elsif ($realfile =~ /\.c$/ && defined $stat && 6219 $stat =~ /^.\s*extern\s+/) 6220 { 6221 WARN("AVOID_EXTERNS", 6222 "externs should be avoided in .c files\n" . $herecurr); 6223 } 6224 6225# check for function declarations that have arguments without identifier names 6226 if (defined $stat && 6227 $stat =~ /^.\s*(?:extern\s+)?$Type\s*(?:$Ident|\(\s*\*\s*$Ident\s*\))\s*\(\s*([^{]+)\s*\)\s*;/s && 6228 $1 ne "void") { 6229 my $args = trim($1); 6230 while ($args =~ m/\s*($Type\s*(?:$Ident|\(\s*\*\s*$Ident?\s*\)\s*$balanced_parens)?)/g) { 6231 my $arg = trim($1); 6232 if ($arg =~ /^$Type$/ && $arg !~ /enum\s+$Ident$/) { 6233 WARN("FUNCTION_ARGUMENTS", 6234 "function definition argument '$arg' should also have an identifier name\n" . $herecurr); 6235 } 6236 } 6237 } 6238 6239# check for function definitions 6240 if ($perl_version_ok && 6241 defined $stat && 6242 $stat =~ /^.\s*(?:$Storage\s+)?$Type\s*($Ident)\s*$balanced_parens\s*{/s) { 6243 $context_function = $1; 6244 6245# check for multiline function definition with misplaced open brace 6246 my $ok = 0; 6247 my $cnt = statement_rawlines($stat); 6248 my $herectx = $here . "\n"; 6249 for (my $n = 0; $n < $cnt; $n++) { 6250 my $rl = raw_line($linenr, $n); 6251 $herectx .= $rl . "\n"; 6252 $ok = 1 if ($rl =~ /^[ \+]\{/); 6253 $ok = 1 if ($rl =~ /\{/ && $n == 0); 6254 last if $rl =~ /^[ \+].*\{/; 6255 } 6256 if (!$ok) { 6257 ERROR("OPEN_BRACE", 6258 "open brace '{' following function definitions go on the next line\n" . $herectx); 6259 } 6260 } 6261 6262# checks for new __setup's 6263 if ($rawline =~ /\b__setup\("([^"]*)"/) { 6264 my $name = $1; 6265 6266 if (!grep(/$name/, @setup_docs)) { 6267 CHK("UNDOCUMENTED_SETUP", 6268 "__setup appears un-documented -- check Documentation/admin-guide/kernel-parameters.rst\n" . $herecurr); 6269 } 6270 } 6271 6272# check for pointless casting of alloc functions 6273 if ($line =~ /\*\s*\)\s*$allocFunctions\b/) { 6274 WARN("UNNECESSARY_CASTS", 6275 "unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr); 6276 } 6277 6278# alloc style 6279# p = alloc(sizeof(struct foo), ...) should be p = alloc(sizeof(*p), ...) 6280 if ($perl_version_ok && 6281 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k|v)[mz]alloc(?:_node)?)\s*\(\s*(sizeof\s*\(\s*struct\s+$Lval\s*\))/) { 6282 CHK("ALLOC_SIZEOF_STRUCT", 6283 "Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr); 6284 } 6285 6286# check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc 6287 if ($perl_version_ok && 6288 defined $stat && 6289 $stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) { 6290 my $oldfunc = $3; 6291 my $a1 = $4; 6292 my $a2 = $10; 6293 my $newfunc = "kmalloc_array"; 6294 $newfunc = "kcalloc" if ($oldfunc eq "kzalloc"); 6295 my $r1 = $a1; 6296 my $r2 = $a2; 6297 if ($a1 =~ /^sizeof\s*\S/) { 6298 $r1 = $a2; 6299 $r2 = $a1; 6300 } 6301 if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ && 6302 !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_][A-Z0-9_]*$/)) { 6303 my $cnt = statement_rawlines($stat); 6304 my $herectx = get_stat_here($linenr, $cnt, $here); 6305 6306 if (WARN("ALLOC_WITH_MULTIPLY", 6307 "Prefer $newfunc over $oldfunc with multiply\n" . $herectx) && 6308 $cnt == 1 && 6309 $fix) { 6310 $fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e; 6311 } 6312 } 6313 } 6314 6315# check for krealloc arg reuse 6316 if ($perl_version_ok && 6317 $line =~ /\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*krealloc\s*\(\s*($Lval)\s*,/ && 6318 $1 eq $3) { 6319 WARN("KREALLOC_ARG_REUSE", 6320 "Reusing the krealloc arg is almost always a bug\n" . $herecurr); 6321 } 6322 6323# check for alloc argument mismatch 6324 if ($line =~ /\b(kcalloc|kmalloc_array)\s*\(\s*sizeof\b/) { 6325 WARN("ALLOC_ARRAY_ARGS", 6326 "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr); 6327 } 6328 6329# check for multiple semicolons 6330 if ($line =~ /;\s*;\s*$/) { 6331 if (WARN("ONE_SEMICOLON", 6332 "Statements terminations use 1 semicolon\n" . $herecurr) && 6333 $fix) { 6334 $fixed[$fixlinenr] =~ s/(\s*;\s*){2,}$/;/g; 6335 } 6336 } 6337 6338# check for #defines like: 1 << <digit> that could be BIT(digit), it is not exported to uapi 6339 if ($realfile !~ m@^include/uapi/@ && 6340 $line =~ /#\s*define\s+\w+\s+\(?\s*1\s*([ulUL]*)\s*\<\<\s*(?:\d+|$Ident)\s*\)?/) { 6341 my $ull = ""; 6342 $ull = "_ULL" if (defined($1) && $1 =~ /ll/i); 6343 if (CHK("BIT_MACRO", 6344 "Prefer using the BIT$ull macro\n" . $herecurr) && 6345 $fix) { 6346 $fixed[$fixlinenr] =~ s/\(?\s*1\s*[ulUL]*\s*<<\s*(\d+|$Ident)\s*\)?/BIT${ull}($1)/; 6347 } 6348 } 6349 6350# check for #if defined CONFIG_<FOO> || defined CONFIG_<FOO>_MODULE 6351 if ($line =~ /^\+\s*#\s*if\s+defined(?:\s*\(?\s*|\s+)(CONFIG_[A-Z_]+)\s*\)?\s*\|\|\s*defined(?:\s*\(?\s*|\s+)\1_MODULE\s*\)?\s*$/) { 6352 my $config = $1; 6353 if (WARN("PREFER_IS_ENABLED", 6354 "Prefer IS_ENABLED(<FOO>) to CONFIG_<FOO> || CONFIG_<FOO>_MODULE\n" . $herecurr) && 6355 $fix) { 6356 $fixed[$fixlinenr] = "\+#if IS_ENABLED($config)"; 6357 } 6358 } 6359 6360# check for case / default statements not preceded by break/fallthrough/switch 6361 if ($line =~ /^.\s*(?:case\s+(?:$Ident|$Constant)\s*|default):/) { 6362 my $has_break = 0; 6363 my $has_statement = 0; 6364 my $count = 0; 6365 my $prevline = $linenr; 6366 while ($prevline > 1 && ($file || $count < 3) && !$has_break) { 6367 $prevline--; 6368 my $rline = $rawlines[$prevline - 1]; 6369 my $fline = $lines[$prevline - 1]; 6370 last if ($fline =~ /^\@\@/); 6371 next if ($fline =~ /^\-/); 6372 next if ($fline =~ /^.(?:\s*(?:case\s+(?:$Ident|$Constant)[\s$;]*|default):[\s$;]*)*$/); 6373 $has_break = 1 if ($rline =~ /fall[\s_-]*(through|thru)/i); 6374 next if ($fline =~ /^.[\s$;]*$/); 6375 $has_statement = 1; 6376 $count++; 6377 $has_break = 1 if ($fline =~ /\bswitch\b|\b(?:break\s*;[\s$;]*$|exit\s*\(\b|return\b|goto\b|continue\b)/); 6378 } 6379 if (!$has_break && $has_statement) { 6380 WARN("MISSING_BREAK", 6381 "Possible switch case/default not preceded by break or fallthrough comment\n" . $herecurr); 6382 } 6383 } 6384 6385# check for switch/default statements without a break; 6386 if ($perl_version_ok && 6387 defined $stat && 6388 $stat =~ /^\+[$;\s]*(?:case[$;\s]+\w+[$;\s]*:[$;\s]*|)*[$;\s]*\bdefault[$;\s]*:[$;\s]*;/g) { 6389 my $cnt = statement_rawlines($stat); 6390 my $herectx = get_stat_here($linenr, $cnt, $here); 6391 6392 WARN("DEFAULT_NO_BREAK", 6393 "switch default: should use break\n" . $herectx); 6394 } 6395 6396# check for gcc specific __FUNCTION__ 6397 if ($line =~ /\b__FUNCTION__\b/) { 6398 if (WARN("USE_FUNC", 6399 "__func__ should be used instead of gcc specific __FUNCTION__\n" . $herecurr) && 6400 $fix) { 6401 $fixed[$fixlinenr] =~ s/\b__FUNCTION__\b/__func__/g; 6402 } 6403 } 6404 6405# check for uses of __DATE__, __TIME__, __TIMESTAMP__ 6406 while ($line =~ /\b(__(?:DATE|TIME|TIMESTAMP)__)\b/g) { 6407 ERROR("DATE_TIME", 6408 "Use of the '$1' macro makes the build non-deterministic\n" . $herecurr); 6409 } 6410 6411# check for use of yield() 6412 if ($line =~ /\byield\s*\(\s*\)/) { 6413 WARN("YIELD", 6414 "Using yield() is generally wrong. See yield() kernel-doc (sched/core.c)\n" . $herecurr); 6415 } 6416 6417# check for comparisons against true and false 6418 if ($line =~ /\+\s*(.*?)\b(true|false|$Lval)\s*(==|\!=)\s*(true|false|$Lval)\b(.*)$/i) { 6419 my $lead = $1; 6420 my $arg = $2; 6421 my $test = $3; 6422 my $otype = $4; 6423 my $trail = $5; 6424 my $op = "!"; 6425 6426 ($arg, $otype) = ($otype, $arg) if ($arg =~ /^(?:true|false)$/i); 6427 6428 my $type = lc($otype); 6429 if ($type =~ /^(?:true|false)$/) { 6430 if (("$test" eq "==" && "$type" eq "true") || 6431 ("$test" eq "!=" && "$type" eq "false")) { 6432 $op = ""; 6433 } 6434 6435 CHK("BOOL_COMPARISON", 6436 "Using comparison to $otype is error prone\n" . $herecurr); 6437 6438## maybe suggesting a correct construct would better 6439## "Using comparison to $otype is error prone. Perhaps use '${lead}${op}${arg}${trail}'\n" . $herecurr); 6440 6441 } 6442 } 6443 6444# check for semaphores initialized locked 6445 if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { 6446 WARN("CONSIDER_COMPLETION", 6447 "consider using a completion\n" . $herecurr); 6448 } 6449 6450# recommend kstrto* over simple_strto* and strict_strto* 6451 if ($line =~ /\b((simple|strict)_(strto(l|ll|ul|ull)))\s*\(/) { 6452 WARN("CONSIDER_KSTRTO", 6453 "$1 is obsolete, use k$3 instead\n" . $herecurr); 6454 } 6455 6456# check for __initcall(), use device_initcall() explicitly or more appropriate function please 6457 if ($line =~ /^.\s*__initcall\s*\(/) { 6458 WARN("USE_DEVICE_INITCALL", 6459 "please use device_initcall() or more appropriate function instead of __initcall() (see include/linux/init.h)\n" . $herecurr); 6460 } 6461 6462# check for spin_is_locked(), suggest lockdep instead 6463 if ($line =~ /\bspin_is_locked\(/) { 6464 WARN("USE_LOCKDEP", 6465 "Where possible, use lockdep_assert_held instead of assertions based on spin_is_locked\n" . $herecurr); 6466 } 6467 6468# check for deprecated apis 6469 if ($line =~ /\b($deprecated_apis_search)\b\s*\(/) { 6470 my $deprecated_api = $1; 6471 my $new_api = $deprecated_apis{$deprecated_api}; 6472 WARN("DEPRECATED_API", 6473 "Deprecated use of '$deprecated_api', prefer '$new_api' instead\n" . $herecurr); 6474 } 6475 6476# check for various structs that are normally const (ops, kgdb, device_tree) 6477# and avoid what seem like struct definitions 'struct foo {' 6478 if ($line !~ /\bconst\b/ && 6479 $line =~ /\bstruct\s+($const_structs)\b(?!\s*\{)/) { 6480 WARN("CONST_STRUCT", 6481 "struct $1 should normally be const\n" . $herecurr); 6482 } 6483 6484# use of NR_CPUS is usually wrong 6485# ignore definitions of NR_CPUS and usage to define arrays as likely right 6486 if ($line =~ /\bNR_CPUS\b/ && 6487 $line !~ /^.\s*\s*#\s*if\b.*\bNR_CPUS\b/ && 6488 $line !~ /^.\s*\s*#\s*define\b.*\bNR_CPUS\b/ && 6489 $line !~ /^.\s*$Declare\s.*\[[^\]]*NR_CPUS[^\]]*\]/ && 6490 $line !~ /\[[^\]]*\.\.\.[^\]]*NR_CPUS[^\]]*\]/ && 6491 $line !~ /\[[^\]]*NR_CPUS[^\]]*\.\.\.[^\]]*\]/) 6492 { 6493 WARN("NR_CPUS", 6494 "usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc\n" . $herecurr); 6495 } 6496 6497# Use of __ARCH_HAS_<FOO> or ARCH_HAVE_<BAR> is wrong. 6498 if ($line =~ /\+\s*#\s*define\s+((?:__)?ARCH_(?:HAS|HAVE)\w*)\b/) { 6499 ERROR("DEFINE_ARCH_HAS", 6500 "#define of '$1' is wrong - use Kconfig variables or standard guards instead\n" . $herecurr); 6501 } 6502 6503# likely/unlikely comparisons similar to "(likely(foo) > 0)" 6504 if ($perl_version_ok && 6505 $line =~ /\b((?:un)?likely)\s*\(\s*$FuncArg\s*\)\s*$Compare/) { 6506 WARN("LIKELY_MISUSE", 6507 "Using $1 should generally have parentheses around the comparison\n" . $herecurr); 6508 } 6509 6510# nested likely/unlikely calls 6511 if ($line =~ /\b(?:(?:un)?likely)\s*\(\s*!?\s*(IS_ERR(?:_OR_NULL|_VALUE)?|WARN)/) { 6512 WARN("LIKELY_MISUSE", 6513 "nested (un)?likely() calls, $1 already uses unlikely() internally\n" . $herecurr); 6514 } 6515 6516# whine mightly about in_atomic 6517 if ($line =~ /\bin_atomic\s*\(/) { 6518 if ($realfile =~ m@^drivers/@) { 6519 ERROR("IN_ATOMIC", 6520 "do not use in_atomic in drivers\n" . $herecurr); 6521 } elsif ($realfile !~ m@^kernel/@) { 6522 WARN("IN_ATOMIC", 6523 "use of in_atomic() is incorrect outside core kernel code\n" . $herecurr); 6524 } 6525 } 6526 6527# check for mutex_trylock_recursive usage 6528 if ($line =~ /mutex_trylock_recursive/) { 6529 ERROR("LOCKING", 6530 "recursive locking is bad, do not use this ever.\n" . $herecurr); 6531 } 6532 6533# check for lockdep_set_novalidate_class 6534 if ($line =~ /^.\s*lockdep_set_novalidate_class\s*\(/ || 6535 $line =~ /__lockdep_no_validate__\s*\)/ ) { 6536 if ($realfile !~ m@^kernel/lockdep@ && 6537 $realfile !~ m@^include/linux/lockdep@ && 6538 $realfile !~ m@^drivers/base/core@) { 6539 ERROR("LOCKDEP", 6540 "lockdep_no_validate class is reserved for device->mutex.\n" . $herecurr); 6541 } 6542 } 6543 6544 if ($line =~ /debugfs_create_\w+.*\b$mode_perms_world_writable\b/ || 6545 $line =~ /DEVICE_ATTR.*\b$mode_perms_world_writable\b/) { 6546 WARN("EXPORTED_WORLD_WRITABLE", 6547 "Exporting world writable files is usually an error. Consider more restrictive permissions.\n" . $herecurr); 6548 } 6549 6550# check for DEVICE_ATTR uses that could be DEVICE_ATTR_<FOO> 6551# and whether or not function naming is typical and if 6552# DEVICE_ATTR permissions uses are unusual too 6553 if ($perl_version_ok && 6554 defined $stat && 6555 $stat =~ /\bDEVICE_ATTR\s*\(\s*(\w+)\s*,\s*\(?\s*(\s*(?:${multi_mode_perms_string_search}|0[0-7]{3,3})\s*)\s*\)?\s*,\s*(\w+)\s*,\s*(\w+)\s*\)/) { 6556 my $var = $1; 6557 my $perms = $2; 6558 my $show = $3; 6559 my $store = $4; 6560 my $octal_perms = perms_to_octal($perms); 6561 if ($show =~ /^${var}_show$/ && 6562 $store =~ /^${var}_store$/ && 6563 $octal_perms eq "0644") { 6564 if (WARN("DEVICE_ATTR_RW", 6565 "Use DEVICE_ATTR_RW\n" . $herecurr) && 6566 $fix) { 6567 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*$store\s*\)/DEVICE_ATTR_RW(${var})/; 6568 } 6569 } elsif ($show =~ /^${var}_show$/ && 6570 $store =~ /^NULL$/ && 6571 $octal_perms eq "0444") { 6572 if (WARN("DEVICE_ATTR_RO", 6573 "Use DEVICE_ATTR_RO\n" . $herecurr) && 6574 $fix) { 6575 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*$show\s*,\s*NULL\s*\)/DEVICE_ATTR_RO(${var})/; 6576 } 6577 } elsif ($show =~ /^NULL$/ && 6578 $store =~ /^${var}_store$/ && 6579 $octal_perms eq "0200") { 6580 if (WARN("DEVICE_ATTR_WO", 6581 "Use DEVICE_ATTR_WO\n" . $herecurr) && 6582 $fix) { 6583 $fixed[$fixlinenr] =~ s/\bDEVICE_ATTR\s*\(\s*$var\s*,\s*\Q$perms\E\s*,\s*NULL\s*,\s*$store\s*\)/DEVICE_ATTR_WO(${var})/; 6584 } 6585 } elsif ($octal_perms eq "0644" || 6586 $octal_perms eq "0444" || 6587 $octal_perms eq "0200") { 6588 my $newshow = "$show"; 6589 $newshow = "${var}_show" if ($show ne "NULL" && $show ne "${var}_show"); 6590 my $newstore = $store; 6591 $newstore = "${var}_store" if ($store ne "NULL" && $store ne "${var}_store"); 6592 my $rename = ""; 6593 if ($show ne $newshow) { 6594 $rename .= " '$show' to '$newshow'"; 6595 } 6596 if ($store ne $newstore) { 6597 $rename .= " '$store' to '$newstore'"; 6598 } 6599 WARN("DEVICE_ATTR_FUNCTIONS", 6600 "Consider renaming function(s)$rename\n" . $herecurr); 6601 } else { 6602 WARN("DEVICE_ATTR_PERMS", 6603 "DEVICE_ATTR unusual permissions '$perms' used\n" . $herecurr); 6604 } 6605 } 6606 6607# Mode permission misuses where it seems decimal should be octal 6608# This uses a shortcut match to avoid unnecessary uses of a slow foreach loop 6609# o Ignore module_param*(...) uses with a decimal 0 permission as that has a 6610# specific definition of not visible in sysfs. 6611# o Ignore proc_create*(...) uses with a decimal 0 permission as that means 6612# use the default permissions 6613 if ($perl_version_ok && 6614 defined $stat && 6615 $line =~ /$mode_perms_search/) { 6616 foreach my $entry (@mode_permission_funcs) { 6617 my $func = $entry->[0]; 6618 my $arg_pos = $entry->[1]; 6619 6620 my $lc = $stat =~ tr@\n@@; 6621 $lc = $lc + $linenr; 6622 my $stat_real = get_stat_real($linenr, $lc); 6623 6624 my $skip_args = ""; 6625 if ($arg_pos > 1) { 6626 $arg_pos--; 6627 $skip_args = "(?:\\s*$FuncArg\\s*,\\s*){$arg_pos,$arg_pos}"; 6628 } 6629 my $test = "\\b$func\\s*\\(${skip_args}($FuncArg(?:\\|\\s*$FuncArg)*)\\s*[,\\)]"; 6630 if ($stat =~ /$test/) { 6631 my $val = $1; 6632 $val = $6 if ($skip_args ne ""); 6633 if (!($func =~ /^(?:module_param|proc_create)/ && $val eq "0") && 6634 (($val =~ /^$Int$/ && $val !~ /^$Octal$/) || 6635 ($val =~ /^$Octal$/ && length($val) ne 4))) { 6636 ERROR("NON_OCTAL_PERMISSIONS", 6637 "Use 4 digit octal (0777) not decimal permissions\n" . "$here\n" . $stat_real); 6638 } 6639 if ($val =~ /^$Octal$/ && (oct($val) & 02)) { 6640 ERROR("EXPORTED_WORLD_WRITABLE", 6641 "Exporting writable files is usually an error. Consider more restrictive permissions.\n" . "$here\n" . $stat_real); 6642 } 6643 } 6644 } 6645 } 6646 6647# check for uses of S_<PERMS> that could be octal for readability 6648 while ($line =~ m{\b($multi_mode_perms_string_search)\b}g) { 6649 my $oval = $1; 6650 my $octal = perms_to_octal($oval); 6651 if (WARN("SYMBOLIC_PERMS", 6652 "Symbolic permissions '$oval' are not preferred. Consider using octal permissions '$octal'.\n" . $herecurr) && 6653 $fix) { 6654 $fixed[$fixlinenr] =~ s/\Q$oval\E/$octal/; 6655 } 6656 } 6657 6658# validate content of MODULE_LICENSE against list from include/linux/module.h 6659 if ($line =~ /\bMODULE_LICENSE\s*\(\s*($String)\s*\)/) { 6660 my $extracted_string = get_quoted_string($line, $rawline); 6661 my $valid_licenses = qr{ 6662 GPL| 6663 GPL\ v2| 6664 GPL\ and\ additional\ rights| 6665 Dual\ BSD/GPL| 6666 Dual\ MIT/GPL| 6667 Dual\ MPL/GPL| 6668 Proprietary 6669 }x; 6670 if ($extracted_string !~ /^"(?:$valid_licenses)"$/x) { 6671 WARN("MODULE_LICENSE", 6672 "unknown module license " . $extracted_string . "\n" . $herecurr); 6673 } 6674 } 6675 6676# check for sysctl duplicate constants 6677 if ($line =~ /\.extra[12]\s*=\s*&(zero|one|int_max)\b/) { 6678 WARN("DUPLICATED_SYSCTL_CONST", 6679 "duplicated sysctl range checking value '$1', consider using the shared one in include/linux/sysctl.h\n" . $herecurr); 6680 } 6681 } 6682 6683 # If we have no input at all, then there is nothing to report on 6684 # so just keep quiet. 6685 if ($#rawlines == -1) { 6686 exit(0); 6687 } 6688 6689 # In mailback mode only produce a report in the negative, for 6690 # things that appear to be patches. 6691 if ($mailback && ($clean == 1 || !$is_patch)) { 6692 exit(0); 6693 } 6694 6695 # This is not a patch, and we are are in 'no-patch' mode so 6696 # just keep quiet. 6697 if (!$chk_patch && !$is_patch) { 6698 exit(0); 6699 } 6700 6701 if (!$is_patch && $filename !~ /cover-letter\.patch$/) { 6702 ERROR("NOT_UNIFIED_DIFF", 6703 "Does not appear to be a unified-diff format patch\n"); 6704 } 6705 if ($is_patch && $has_commit_log && $chk_signoff) { 6706 if ($signoff == 0) { 6707 ERROR("MISSING_SIGN_OFF", 6708 "Missing Signed-off-by: line(s)\n"); 6709 } elsif (!$authorsignoff) { 6710 WARN("NO_AUTHOR_SIGN_OFF", 6711 "Missing Signed-off-by: line by nominal patch author '$author'\n"); 6712 } 6713 } 6714 6715 print report_dump(); 6716 if ($summary && !($clean == 1 && $quiet == 1)) { 6717 print "$filename " if ($summary_file); 6718 print "total: $cnt_error errors, $cnt_warn warnings, " . 6719 (($check)? "$cnt_chk checks, " : "") . 6720 "$cnt_lines lines checked\n"; 6721 } 6722 6723 if ($quiet == 0) { 6724 # If there were any defects found and not already fixing them 6725 if (!$clean and !$fix) { 6726 print << "EOM" 6727 6728NOTE: For some of the reported defects, checkpatch may be able to 6729 mechanically convert to the typical style using --fix or --fix-inplace. 6730EOM 6731 } 6732 # If there were whitespace errors which cleanpatch can fix 6733 # then suggest that. 6734 if ($rpt_cleaners) { 6735 $rpt_cleaners = 0; 6736 print << "EOM" 6737 6738NOTE: Whitespace errors detected. 6739 You may wish to use scripts/cleanpatch or scripts/cleanfile 6740EOM 6741 } 6742 } 6743 6744 if ($clean == 0 && $fix && 6745 ("@rawlines" ne "@fixed" || 6746 $#fixed_inserted >= 0 || $#fixed_deleted >= 0)) { 6747 my $newfile = $filename; 6748 $newfile .= ".EXPERIMENTAL-checkpatch-fixes" if (!$fix_inplace); 6749 my $linecount = 0; 6750 my $f; 6751 6752 @fixed = fix_inserted_deleted_lines(\@fixed, \@fixed_inserted, \@fixed_deleted); 6753 6754 open($f, '>', $newfile) 6755 or die "$P: Can't open $newfile for write\n"; 6756 foreach my $fixed_line (@fixed) { 6757 $linecount++; 6758 if ($file) { 6759 if ($linecount > 3) { 6760 $fixed_line =~ s/^\+//; 6761 print $f $fixed_line . "\n"; 6762 } 6763 } else { 6764 print $f $fixed_line . "\n"; 6765 } 6766 } 6767 close($f); 6768 6769 if (!$quiet) { 6770 print << "EOM"; 6771 6772Wrote EXPERIMENTAL --fix correction(s) to '$newfile' 6773 6774Do _NOT_ trust the results written to this file. 6775Do _NOT_ submit these changes without inspecting them for correctness. 6776 6777This EXPERIMENTAL file is simply a convenience to help rewrite patches. 6778No warranties, expressed or implied... 6779EOM 6780 } 6781 } 6782 6783 if ($quiet == 0) { 6784 print "\n"; 6785 if ($clean == 1) { 6786 print "$vname has no obvious style problems and is ready for submission.\n"; 6787 } else { 6788 print "$vname has style problems, please review.\n"; 6789 } 6790 } 6791 return $clean; 6792} 6793