1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_SPINLOCK_H 3 #define __LINUX_SPINLOCK_H 4 #define __LINUX_INSIDE_SPINLOCK_H 5 6 /* 7 * include/linux/spinlock.h - generic spinlock/rwlock declarations 8 * 9 * here's the role of the various spinlock/rwlock related include files: 10 * 11 * on SMP builds: 12 * 13 * asm/spinlock_types.h: contains the arch_spinlock_t/arch_rwlock_t and the 14 * initializers 15 * 16 * linux/spinlock_types_raw: 17 * The raw types and initializers 18 * linux/spinlock_types.h: 19 * defines the generic type and initializers 20 * 21 * asm/spinlock.h: contains the arch_spin_*()/etc. lowlevel 22 * implementations, mostly inline assembly code 23 * 24 * (also included on UP-debug builds:) 25 * 26 * linux/spinlock_api_smp.h: 27 * contains the prototypes for the _spin_*() APIs. 28 * 29 * linux/spinlock.h: builds the final spin_*() APIs. 30 * 31 * on UP builds: 32 * 33 * linux/spinlock_type_up.h: 34 * contains the generic, simplified UP spinlock type. 35 * (which is an empty structure on non-debug builds) 36 * 37 * linux/spinlock_types_raw: 38 * The raw RT types and initializers 39 * linux/spinlock_types.h: 40 * defines the generic type and initializers 41 * 42 * linux/spinlock_up.h: 43 * contains the arch_spin_*()/etc. version of UP 44 * builds. (which are NOPs on non-debug, non-preempt 45 * builds) 46 * 47 * (included on UP-non-debug builds:) 48 * 49 * linux/spinlock_api_up.h: 50 * builds the _spin_*() APIs. 51 * 52 * linux/spinlock.h: builds the final spin_*() APIs. 53 */ 54 55 #include <linux/typecheck.h> 56 #include <linux/preempt.h> 57 #include <linux/linkage.h> 58 #include <linux/compiler.h> 59 #include <linux/irqflags.h> 60 #include <linux/thread_info.h> 61 #include <linux/stringify.h> 62 #include <linux/bottom_half.h> 63 #include <linux/lockdep.h> 64 #include <linux/cleanup.h> 65 #include <asm/barrier.h> 66 #include <asm/mmiowb.h> 67 68 69 /* 70 * Must define these before including other files, inline functions need them 71 */ 72 #define LOCK_SECTION_NAME ".text..lock."KBUILD_BASENAME 73 74 #define LOCK_SECTION_START(extra) \ 75 ".subsection 1\n\t" \ 76 extra \ 77 ".ifndef " LOCK_SECTION_NAME "\n\t" \ 78 LOCK_SECTION_NAME ":\n\t" \ 79 ".endif\n" 80 81 #define LOCK_SECTION_END \ 82 ".previous\n\t" 83 84 #define __lockfunc __section(".spinlock.text") 85 86 /* 87 * Pull the arch_spinlock_t and arch_rwlock_t definitions: 88 */ 89 #include <linux/spinlock_types.h> 90 91 /* 92 * Pull the arch_spin*() functions/declarations (UP-nondebug doesn't need them): 93 */ 94 #ifdef CONFIG_SMP 95 # include <asm/spinlock.h> 96 #else 97 # include <linux/spinlock_up.h> 98 #endif 99 100 #ifdef CONFIG_DEBUG_SPINLOCK 101 extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name, 102 struct lock_class_key *key, short inner); 103 104 # define raw_spin_lock_init(lock) \ 105 do { \ 106 static struct lock_class_key __key; \ 107 \ 108 __raw_spin_lock_init((lock), #lock, &__key, LD_WAIT_SPIN); \ 109 } while (0) 110 111 #else 112 # define raw_spin_lock_init(lock) \ 113 do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0) 114 #endif 115 116 #define raw_spin_is_locked(lock) arch_spin_is_locked(&(lock)->raw_lock) 117 118 #ifdef arch_spin_is_contended 119 #define raw_spin_is_contended(lock) arch_spin_is_contended(&(lock)->raw_lock) 120 #else 121 #define raw_spin_is_contended(lock) (((void)(lock), 0)) 122 #endif /*arch_spin_is_contended*/ 123 124 /* 125 * smp_mb__after_spinlock() provides the equivalent of a full memory barrier 126 * between program-order earlier lock acquisitions and program-order later 127 * memory accesses. 128 * 129 * This guarantees that the following two properties hold: 130 * 131 * 1) Given the snippet: 132 * 133 * { X = 0; Y = 0; } 134 * 135 * CPU0 CPU1 136 * 137 * WRITE_ONCE(X, 1); WRITE_ONCE(Y, 1); 138 * spin_lock(S); smp_mb(); 139 * smp_mb__after_spinlock(); r1 = READ_ONCE(X); 140 * r0 = READ_ONCE(Y); 141 * spin_unlock(S); 142 * 143 * it is forbidden that CPU0 does not observe CPU1's store to Y (r0 = 0) 144 * and CPU1 does not observe CPU0's store to X (r1 = 0); see the comments 145 * preceding the call to smp_mb__after_spinlock() in __schedule() and in 146 * try_to_wake_up(). 147 * 148 * 2) Given the snippet: 149 * 150 * { X = 0; Y = 0; } 151 * 152 * CPU0 CPU1 CPU2 153 * 154 * spin_lock(S); spin_lock(S); r1 = READ_ONCE(Y); 155 * WRITE_ONCE(X, 1); smp_mb__after_spinlock(); smp_rmb(); 156 * spin_unlock(S); r0 = READ_ONCE(X); r2 = READ_ONCE(X); 157 * WRITE_ONCE(Y, 1); 158 * spin_unlock(S); 159 * 160 * it is forbidden that CPU0's critical section executes before CPU1's 161 * critical section (r0 = 1), CPU2 observes CPU1's store to Y (r1 = 1) 162 * and CPU2 does not observe CPU0's store to X (r2 = 0); see the comments 163 * preceding the calls to smp_rmb() in try_to_wake_up() for similar 164 * snippets but "projected" onto two CPUs. 165 * 166 * Property (2) upgrades the lock to an RCsc lock. 167 * 168 * Since most load-store architectures implement ACQUIRE with an smp_mb() after 169 * the LL/SC loop, they need no further barriers. Similarly all our TSO 170 * architectures imply an smp_mb() for each atomic instruction and equally don't 171 * need more. 172 * 173 * Architectures that can implement ACQUIRE better need to take care. 174 */ 175 #ifndef smp_mb__after_spinlock 176 #define smp_mb__after_spinlock() kcsan_mb() 177 #endif 178 179 #ifdef CONFIG_DEBUG_SPINLOCK 180 extern void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock); 181 extern int do_raw_spin_trylock(raw_spinlock_t *lock); 182 extern void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock); 183 #else 184 static inline void do_raw_spin_lock(raw_spinlock_t *lock) __acquires(lock) 185 { 186 __acquire(lock); 187 arch_spin_lock(&lock->raw_lock); 188 mmiowb_spin_lock(); 189 } 190 191 static inline int do_raw_spin_trylock(raw_spinlock_t *lock) 192 { 193 int ret = arch_spin_trylock(&(lock)->raw_lock); 194 195 if (ret) 196 mmiowb_spin_lock(); 197 198 return ret; 199 } 200 201 static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock) 202 { 203 mmiowb_spin_unlock(); 204 arch_spin_unlock(&lock->raw_lock); 205 __release(lock); 206 } 207 #endif 208 209 /* 210 * Define the various spin_lock methods. Note we define these 211 * regardless of whether CONFIG_SMP or CONFIG_PREEMPTION are set. The 212 * various methods are defined as nops in the case they are not 213 * required. 214 */ 215 #define raw_spin_trylock(lock) _raw_spin_trylock(lock) 216 217 #define raw_spin_lock(lock) _raw_spin_lock(lock) 218 219 #ifdef CONFIG_DEBUG_LOCK_ALLOC 220 # define raw_spin_lock_nested(lock, subclass) \ 221 _raw_spin_lock_nested(lock, subclass) 222 223 # define raw_spin_lock_nest_lock(lock, nest_lock) \ 224 do { \ 225 typecheck(struct lockdep_map *, &(nest_lock)->dep_map);\ 226 _raw_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \ 227 } while (0) 228 #else 229 /* 230 * Always evaluate the 'subclass' argument to avoid that the compiler 231 * warns about set-but-not-used variables when building with 232 * CONFIG_DEBUG_LOCK_ALLOC=n and with W=1. 233 */ 234 # define raw_spin_lock_nested(lock, subclass) \ 235 _raw_spin_lock(((void)(subclass), (lock))) 236 # define raw_spin_lock_nest_lock(lock, nest_lock) _raw_spin_lock(lock) 237 #endif 238 239 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) 240 241 #define raw_spin_lock_irqsave(lock, flags) \ 242 do { \ 243 typecheck(unsigned long, flags); \ 244 flags = _raw_spin_lock_irqsave(lock); \ 245 } while (0) 246 247 #ifdef CONFIG_DEBUG_LOCK_ALLOC 248 #define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ 249 do { \ 250 typecheck(unsigned long, flags); \ 251 flags = _raw_spin_lock_irqsave_nested(lock, subclass); \ 252 } while (0) 253 #else 254 #define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ 255 do { \ 256 typecheck(unsigned long, flags); \ 257 flags = _raw_spin_lock_irqsave(lock); \ 258 } while (0) 259 #endif 260 261 #else 262 263 #define raw_spin_lock_irqsave(lock, flags) \ 264 do { \ 265 typecheck(unsigned long, flags); \ 266 _raw_spin_lock_irqsave(lock, flags); \ 267 } while (0) 268 269 #define raw_spin_lock_irqsave_nested(lock, flags, subclass) \ 270 raw_spin_lock_irqsave(lock, flags) 271 272 #endif 273 274 #define raw_spin_lock_irq(lock) _raw_spin_lock_irq(lock) 275 #define raw_spin_lock_bh(lock) _raw_spin_lock_bh(lock) 276 #define raw_spin_unlock(lock) _raw_spin_unlock(lock) 277 #define raw_spin_unlock_irq(lock) _raw_spin_unlock_irq(lock) 278 279 #define raw_spin_unlock_irqrestore(lock, flags) \ 280 do { \ 281 typecheck(unsigned long, flags); \ 282 _raw_spin_unlock_irqrestore(lock, flags); \ 283 } while (0) 284 #define raw_spin_unlock_bh(lock) _raw_spin_unlock_bh(lock) 285 286 #define raw_spin_trylock_bh(lock) _raw_spin_trylock_bh(lock) 287 288 #define raw_spin_trylock_irq(lock) _raw_spin_trylock_irq(lock) 289 290 #define raw_spin_trylock_irqsave(lock, flags) _raw_spin_trylock_irqsave(lock, &(flags)) 291 292 #ifndef CONFIG_PREEMPT_RT 293 /* Include rwlock functions for !RT */ 294 #include <linux/rwlock.h> 295 #endif 296 297 /* 298 * Pull the _spin_*()/_read_*()/_write_*() functions/declarations: 299 */ 300 #if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) 301 # include <linux/spinlock_api_smp.h> 302 #else 303 # include <linux/spinlock_api_up.h> 304 #endif 305 306 /* Non PREEMPT_RT kernel, map to raw spinlocks: */ 307 #ifndef CONFIG_PREEMPT_RT 308 309 /* 310 * Map the spin_lock functions to the raw variants for PREEMPT_RT=n 311 */ 312 313 static __always_inline raw_spinlock_t *spinlock_check(spinlock_t *lock) 314 { 315 return &lock->rlock; 316 } 317 318 #ifdef CONFIG_DEBUG_SPINLOCK 319 320 # define spin_lock_init(lock) \ 321 do { \ 322 static struct lock_class_key __key; \ 323 \ 324 __raw_spin_lock_init(spinlock_check(lock), \ 325 #lock, &__key, LD_WAIT_CONFIG); \ 326 } while (0) 327 328 #else 329 330 # define spin_lock_init(_lock) \ 331 do { \ 332 spinlock_check(_lock); \ 333 *(_lock) = __SPIN_LOCK_UNLOCKED(_lock); \ 334 } while (0) 335 336 #endif 337 338 static __always_inline void spin_lock(spinlock_t *lock) 339 __acquires(lock) __no_context_analysis 340 { 341 raw_spin_lock(&lock->rlock); 342 } 343 344 static __always_inline void spin_lock_bh(spinlock_t *lock) 345 __acquires(lock) __no_context_analysis 346 { 347 raw_spin_lock_bh(&lock->rlock); 348 } 349 350 static __always_inline int spin_trylock(spinlock_t *lock) 351 __cond_acquires(true, lock) __no_context_analysis 352 { 353 return raw_spin_trylock(&lock->rlock); 354 } 355 356 #define spin_lock_nested(lock, subclass) \ 357 do { \ 358 raw_spin_lock_nested(spinlock_check(lock), subclass); \ 359 __release(spinlock_check(lock)); __acquire(lock); \ 360 } while (0) 361 362 #define spin_lock_nest_lock(lock, nest_lock) \ 363 do { \ 364 raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock); \ 365 __release(spinlock_check(lock)); __acquire(lock); \ 366 } while (0) 367 368 static __always_inline void spin_lock_irq(spinlock_t *lock) 369 __acquires(lock) __no_context_analysis 370 { 371 raw_spin_lock_irq(&lock->rlock); 372 } 373 374 #define spin_lock_irqsave(lock, flags) \ 375 do { \ 376 raw_spin_lock_irqsave(spinlock_check(lock), flags); \ 377 __release(spinlock_check(lock)); __acquire(lock); \ 378 } while (0) 379 380 #define spin_lock_irqsave_nested(lock, flags, subclass) \ 381 do { \ 382 raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \ 383 __release(spinlock_check(lock)); __acquire(lock); \ 384 } while (0) 385 386 static __always_inline void spin_unlock(spinlock_t *lock) 387 __releases(lock) __no_context_analysis 388 { 389 raw_spin_unlock(&lock->rlock); 390 } 391 392 static __always_inline void spin_unlock_bh(spinlock_t *lock) 393 __releases(lock) __no_context_analysis 394 { 395 raw_spin_unlock_bh(&lock->rlock); 396 } 397 398 static __always_inline void spin_unlock_irq(spinlock_t *lock) 399 __releases(lock) __no_context_analysis 400 { 401 raw_spin_unlock_irq(&lock->rlock); 402 } 403 404 static __always_inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) 405 __releases(lock) __no_context_analysis 406 { 407 raw_spin_unlock_irqrestore(&lock->rlock, flags); 408 } 409 410 static __always_inline int spin_trylock_bh(spinlock_t *lock) 411 __cond_acquires(true, lock) __no_context_analysis 412 { 413 return raw_spin_trylock_bh(&lock->rlock); 414 } 415 416 static __always_inline int spin_trylock_irq(spinlock_t *lock) 417 __cond_acquires(true, lock) __no_context_analysis 418 { 419 return raw_spin_trylock_irq(&lock->rlock); 420 } 421 422 static __always_inline bool _spin_trylock_irqsave(spinlock_t *lock, unsigned long *flags) 423 __cond_acquires(true, lock) __no_context_analysis 424 { 425 return raw_spin_trylock_irqsave(spinlock_check(lock), *flags); 426 } 427 #define spin_trylock_irqsave(lock, flags) _spin_trylock_irqsave(lock, &(flags)) 428 429 /** 430 * spin_is_locked() - Check whether a spinlock is locked. 431 * @lock: Pointer to the spinlock. 432 * 433 * This function is NOT required to provide any memory ordering 434 * guarantees; it could be used for debugging purposes or, when 435 * additional synchronization is needed, accompanied with other 436 * constructs (memory barriers) enforcing the synchronization. 437 * 438 * Returns: 1 if @lock is locked, 0 otherwise. 439 * 440 * Note that the function only tells you that the spinlock is 441 * seen to be locked, not that it is locked on your CPU. 442 * 443 * Further, on CONFIG_SMP=n builds with CONFIG_DEBUG_SPINLOCK=n, 444 * the return value is always 0 (see include/linux/spinlock_up.h). 445 * Therefore you should not rely heavily on the return value. 446 */ 447 static __always_inline int spin_is_locked(spinlock_t *lock) 448 { 449 return raw_spin_is_locked(&lock->rlock); 450 } 451 452 static __always_inline int spin_is_contended(spinlock_t *lock) 453 { 454 return raw_spin_is_contended(&lock->rlock); 455 } 456 457 #define assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock) 458 459 #else /* !CONFIG_PREEMPT_RT */ 460 # include <linux/spinlock_rt.h> 461 #endif /* CONFIG_PREEMPT_RT */ 462 463 /* 464 * Does a critical section need to be broken due to another 465 * task waiting?: (technically does not depend on CONFIG_PREEMPTION, 466 * but a general need for low latency) 467 */ 468 static inline int spin_needbreak(spinlock_t *lock) 469 { 470 if (!preempt_model_preemptible()) 471 return 0; 472 473 return spin_is_contended(lock); 474 } 475 476 /* 477 * Check if a rwlock is contended. 478 * Returns non-zero if there is another task waiting on the rwlock. 479 * Returns zero if the lock is not contended or the system / underlying 480 * rwlock implementation does not support contention detection. 481 * Technically does not depend on CONFIG_PREEMPTION, but a general need 482 * for low latency. 483 */ 484 static inline int rwlock_needbreak(rwlock_t *lock) 485 { 486 if (!preempt_model_preemptible()) 487 return 0; 488 489 return rwlock_is_contended(lock); 490 } 491 492 /* 493 * Pull the atomic_t declaration: 494 * (asm-mips/atomic.h needs above definitions) 495 */ 496 #include <linux/atomic.h> 497 /** 498 * atomic_dec_and_lock - lock on reaching reference count zero 499 * @atomic: the atomic counter 500 * @lock: the spinlock in question 501 * 502 * Decrements @atomic by 1. If the result is 0, returns true and locks 503 * @lock. Returns false for all other cases. 504 */ 505 extern int atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock) __cond_acquires(true, lock); 506 507 extern int _atomic_dec_and_lock_irqsave(atomic_t *atomic, spinlock_t *lock, 508 unsigned long *flags) __cond_acquires(true, lock); 509 #define atomic_dec_and_lock_irqsave(atomic, lock, flags) _atomic_dec_and_lock_irqsave(atomic, lock, &(flags)) 510 511 extern int atomic_dec_and_raw_lock(atomic_t *atomic, raw_spinlock_t *lock) __cond_acquires(true, lock); 512 513 extern int _atomic_dec_and_raw_lock_irqsave(atomic_t *atomic, raw_spinlock_t *lock, 514 unsigned long *flags) __cond_acquires(true, lock); 515 #define atomic_dec_and_raw_lock_irqsave(atomic, lock, flags) _atomic_dec_and_raw_lock_irqsave(atomic, lock, &(flags)) 516 517 int __alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *lock_mask, 518 size_t max_size, unsigned int cpu_mult, 519 gfp_t gfp, const char *name, 520 struct lock_class_key *key); 521 522 #define alloc_bucket_spinlocks(locks, lock_mask, max_size, cpu_mult, gfp) \ 523 ({ \ 524 static struct lock_class_key key; \ 525 int ret; \ 526 \ 527 ret = __alloc_bucket_spinlocks(locks, lock_mask, max_size, \ 528 cpu_mult, gfp, #locks, &key); \ 529 ret; \ 530 }) 531 532 void free_bucket_spinlocks(spinlock_t *locks); 533 534 DEFINE_LOCK_GUARD_1(raw_spinlock, raw_spinlock_t, 535 raw_spin_lock(_T->lock), 536 raw_spin_unlock(_T->lock)) 537 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 538 #define class_raw_spinlock_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock, _T) 539 540 DEFINE_LOCK_GUARD_1_COND(raw_spinlock, _try, raw_spin_trylock(_T->lock)) 541 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_try, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 542 #define class_raw_spinlock_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_try, _T) 543 544 DEFINE_LOCK_GUARD_1(raw_spinlock_nested, raw_spinlock_t, 545 raw_spin_lock_nested(_T->lock, SINGLE_DEPTH_NESTING), 546 raw_spin_unlock(_T->lock)) 547 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_nested, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 548 #define class_raw_spinlock_nested_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_nested, _T) 549 550 DEFINE_LOCK_GUARD_1(raw_spinlock_irq, raw_spinlock_t, 551 raw_spin_lock_irq(_T->lock), 552 raw_spin_unlock_irq(_T->lock)) 553 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_irq, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 554 #define class_raw_spinlock_irq_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_irq, _T) 555 556 DEFINE_LOCK_GUARD_1_COND(raw_spinlock_irq, _try, raw_spin_trylock_irq(_T->lock)) 557 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_irq_try, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 558 #define class_raw_spinlock_irq_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_irq_try, _T) 559 560 DEFINE_LOCK_GUARD_1(raw_spinlock_bh, raw_spinlock_t, 561 raw_spin_lock_bh(_T->lock), 562 raw_spin_unlock_bh(_T->lock)) 563 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_bh, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 564 #define class_raw_spinlock_bh_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_bh, _T) 565 566 DEFINE_LOCK_GUARD_1_COND(raw_spinlock_bh, _try, raw_spin_trylock_bh(_T->lock)) 567 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_bh_try, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 568 #define class_raw_spinlock_bh_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_bh_try, _T) 569 570 DEFINE_LOCK_GUARD_1(raw_spinlock_irqsave, raw_spinlock_t, 571 raw_spin_lock_irqsave(_T->lock, _T->flags), 572 raw_spin_unlock_irqrestore(_T->lock, _T->flags), 573 unsigned long flags) 574 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_irqsave, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 575 #define class_raw_spinlock_irqsave_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_irqsave, _T) 576 577 DEFINE_LOCK_GUARD_1_COND(raw_spinlock_irqsave, _try, 578 raw_spin_trylock_irqsave(_T->lock, _T->flags)) 579 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_irqsave_try, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 580 #define class_raw_spinlock_irqsave_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_irqsave_try, _T) 581 582 DEFINE_LOCK_GUARD_1(raw_spinlock_init, raw_spinlock_t, raw_spin_lock_init(_T->lock), /* */) 583 DECLARE_LOCK_GUARD_1_ATTRS(raw_spinlock_init, __acquires(_T), __releases(*(raw_spinlock_t **)_T)) 584 #define class_raw_spinlock_init_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(raw_spinlock_init, _T) 585 586 DEFINE_LOCK_GUARD_1(spinlock, spinlock_t, 587 spin_lock(_T->lock), 588 spin_unlock(_T->lock)) 589 DECLARE_LOCK_GUARD_1_ATTRS(spinlock, __acquires(_T), __releases(*(spinlock_t **)_T)) 590 #define class_spinlock_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock, _T) 591 592 DEFINE_LOCK_GUARD_1_COND(spinlock, _try, spin_trylock(_T->lock)) 593 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_try, __acquires(_T), __releases(*(spinlock_t **)_T)) 594 #define class_spinlock_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_try, _T) 595 596 DEFINE_LOCK_GUARD_1(spinlock_irq, spinlock_t, 597 spin_lock_irq(_T->lock), 598 spin_unlock_irq(_T->lock)) 599 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_irq, __acquires(_T), __releases(*(spinlock_t **)_T)) 600 #define class_spinlock_irq_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_irq, _T) 601 602 DEFINE_LOCK_GUARD_1_COND(spinlock_irq, _try, 603 spin_trylock_irq(_T->lock)) 604 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_irq_try, __acquires(_T), __releases(*(spinlock_t **)_T)) 605 #define class_spinlock_irq_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_irq_try, _T) 606 607 DEFINE_LOCK_GUARD_1(spinlock_bh, spinlock_t, 608 spin_lock_bh(_T->lock), 609 spin_unlock_bh(_T->lock)) 610 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_bh, __acquires(_T), __releases(*(spinlock_t **)_T)) 611 #define class_spinlock_bh_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_bh, _T) 612 613 DEFINE_LOCK_GUARD_1_COND(spinlock_bh, _try, 614 spin_trylock_bh(_T->lock)) 615 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_bh_try, __acquires(_T), __releases(*(spinlock_t **)_T)) 616 #define class_spinlock_bh_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_bh_try, _T) 617 618 DEFINE_LOCK_GUARD_1(spinlock_irqsave, spinlock_t, 619 spin_lock_irqsave(_T->lock, _T->flags), 620 spin_unlock_irqrestore(_T->lock, _T->flags), 621 unsigned long flags) 622 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_irqsave, __acquires(_T), __releases(*(spinlock_t **)_T)) 623 #define class_spinlock_irqsave_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_irqsave, _T) 624 625 DEFINE_LOCK_GUARD_1_COND(spinlock_irqsave, _try, 626 spin_trylock_irqsave(_T->lock, _T->flags)) 627 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_irqsave_try, __acquires(_T), __releases(*(spinlock_t **)_T)) 628 #define class_spinlock_irqsave_try_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_irqsave_try, _T) 629 630 DEFINE_LOCK_GUARD_1(spinlock_init, spinlock_t, spin_lock_init(_T->lock), /* */) 631 DECLARE_LOCK_GUARD_1_ATTRS(spinlock_init, __acquires(_T), __releases(*(spinlock_t **)_T)) 632 #define class_spinlock_init_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(spinlock_init, _T) 633 634 DEFINE_LOCK_GUARD_1(read_lock, rwlock_t, 635 read_lock(_T->lock), 636 read_unlock(_T->lock)) 637 DECLARE_LOCK_GUARD_1_ATTRS(read_lock, __acquires(_T), __releases(*(rwlock_t **)_T)) 638 #define class_read_lock_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(read_lock, _T) 639 640 DEFINE_LOCK_GUARD_1(read_lock_irq, rwlock_t, 641 read_lock_irq(_T->lock), 642 read_unlock_irq(_T->lock)) 643 DECLARE_LOCK_GUARD_1_ATTRS(read_lock_irq, __acquires(_T), __releases(*(rwlock_t **)_T)) 644 #define class_read_lock_irq_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(read_lock_irq, _T) 645 646 DEFINE_LOCK_GUARD_1(read_lock_irqsave, rwlock_t, 647 read_lock_irqsave(_T->lock, _T->flags), 648 read_unlock_irqrestore(_T->lock, _T->flags), 649 unsigned long flags) 650 DECLARE_LOCK_GUARD_1_ATTRS(read_lock_irqsave, __acquires(_T), __releases(*(rwlock_t **)_T)) 651 #define class_read_lock_irqsave_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(read_lock_irqsave, _T) 652 653 DEFINE_LOCK_GUARD_1(write_lock, rwlock_t, 654 write_lock(_T->lock), 655 write_unlock(_T->lock)) 656 DECLARE_LOCK_GUARD_1_ATTRS(write_lock, __acquires(_T), __releases(*(rwlock_t **)_T)) 657 #define class_write_lock_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(write_lock, _T) 658 659 DEFINE_LOCK_GUARD_1(write_lock_irq, rwlock_t, 660 write_lock_irq(_T->lock), 661 write_unlock_irq(_T->lock)) 662 DECLARE_LOCK_GUARD_1_ATTRS(write_lock_irq, __acquires(_T), __releases(*(rwlock_t **)_T)) 663 #define class_write_lock_irq_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(write_lock_irq, _T) 664 665 DEFINE_LOCK_GUARD_1(write_lock_irqsave, rwlock_t, 666 write_lock_irqsave(_T->lock, _T->flags), 667 write_unlock_irqrestore(_T->lock, _T->flags), 668 unsigned long flags) 669 DECLARE_LOCK_GUARD_1_ATTRS(write_lock_irqsave, __acquires(_T), __releases(*(rwlock_t **)_T)) 670 #define class_write_lock_irqsave_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(write_lock_irqsave, _T) 671 672 DEFINE_LOCK_GUARD_1(rwlock_init, rwlock_t, rwlock_init(_T->lock), /* */) 673 DECLARE_LOCK_GUARD_1_ATTRS(rwlock_init, __acquires(_T), __releases(*(rwlock_t **)_T)) 674 #define class_rwlock_init_constructor(_T) WITH_LOCK_GUARD_1_ATTRS(rwlock_init, _T) 675 676 #undef __LINUX_INSIDE_SPINLOCK_H 677 #endif /* __LINUX_SPINLOCK_H */ 678