1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 /* 4 * SPU file system 5 * 6 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 7 * 8 * Author: Arnd Bergmann <arndb@de.ibm.com> 9 */ 10 11 #include <linux/file.h> 12 #include <linux/fs.h> 13 #include <linux/fsnotify.h> 14 #include <linux/backing-dev.h> 15 #include <linux/init.h> 16 #include <linux/ioctl.h> 17 #include <linux/module.h> 18 #include <linux/mount.h> 19 #include <linux/namei.h> 20 #include <linux/pagemap.h> 21 #include <linux/poll.h> 22 #include <linux/slab.h> 23 #include <linux/parser.h> 24 25 #include <asm/prom.h> 26 #include <asm/spu.h> 27 #include <asm/spu_priv1.h> 28 #include <linux/uaccess.h> 29 30 #include "spufs.h" 31 32 struct spufs_sb_info { 33 int debug; 34 }; 35 36 static struct kmem_cache *spufs_inode_cache; 37 char *isolated_loader; 38 static int isolated_loader_size; 39 40 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 41 { 42 return sb->s_fs_info; 43 } 44 45 static struct inode * 46 spufs_alloc_inode(struct super_block *sb) 47 { 48 struct spufs_inode_info *ei; 49 50 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 51 if (!ei) 52 return NULL; 53 54 ei->i_gang = NULL; 55 ei->i_ctx = NULL; 56 ei->i_openers = 0; 57 58 return &ei->vfs_inode; 59 } 60 61 static void spufs_free_inode(struct inode *inode) 62 { 63 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 64 } 65 66 static void 67 spufs_init_once(void *p) 68 { 69 struct spufs_inode_info *ei = p; 70 71 inode_init_once(&ei->vfs_inode); 72 } 73 74 static struct inode * 75 spufs_new_inode(struct super_block *sb, umode_t mode) 76 { 77 struct inode *inode; 78 79 inode = new_inode(sb); 80 if (!inode) 81 goto out; 82 83 inode->i_ino = get_next_ino(); 84 inode->i_mode = mode; 85 inode->i_uid = current_fsuid(); 86 inode->i_gid = current_fsgid(); 87 inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode); 88 out: 89 return inode; 90 } 91 92 static int 93 spufs_setattr(struct dentry *dentry, struct iattr *attr) 94 { 95 struct inode *inode = d_inode(dentry); 96 97 if ((attr->ia_valid & ATTR_SIZE) && 98 (attr->ia_size != inode->i_size)) 99 return -EINVAL; 100 setattr_copy(inode, attr); 101 mark_inode_dirty(inode); 102 return 0; 103 } 104 105 106 static int 107 spufs_new_file(struct super_block *sb, struct dentry *dentry, 108 const struct file_operations *fops, umode_t mode, 109 size_t size, struct spu_context *ctx) 110 { 111 static const struct inode_operations spufs_file_iops = { 112 .setattr = spufs_setattr, 113 }; 114 struct inode *inode; 115 int ret; 116 117 ret = -ENOSPC; 118 inode = spufs_new_inode(sb, S_IFREG | mode); 119 if (!inode) 120 goto out; 121 122 ret = 0; 123 inode->i_op = &spufs_file_iops; 124 inode->i_fop = fops; 125 inode->i_size = size; 126 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 127 d_add(dentry, inode); 128 out: 129 return ret; 130 } 131 132 static void 133 spufs_evict_inode(struct inode *inode) 134 { 135 struct spufs_inode_info *ei = SPUFS_I(inode); 136 clear_inode(inode); 137 if (ei->i_ctx) 138 put_spu_context(ei->i_ctx); 139 if (ei->i_gang) 140 put_spu_gang(ei->i_gang); 141 } 142 143 static void spufs_prune_dir(struct dentry *dir) 144 { 145 struct dentry *dentry, *tmp; 146 147 inode_lock(d_inode(dir)); 148 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { 149 spin_lock(&dentry->d_lock); 150 if (simple_positive(dentry)) { 151 dget_dlock(dentry); 152 __d_drop(dentry); 153 spin_unlock(&dentry->d_lock); 154 simple_unlink(d_inode(dir), dentry); 155 /* XXX: what was dcache_lock protecting here? Other 156 * filesystems (IB, configfs) release dcache_lock 157 * before unlink */ 158 dput(dentry); 159 } else { 160 spin_unlock(&dentry->d_lock); 161 } 162 } 163 shrink_dcache_parent(dir); 164 inode_unlock(d_inode(dir)); 165 } 166 167 /* Caller must hold parent->i_mutex */ 168 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 169 { 170 /* remove all entries */ 171 int res; 172 spufs_prune_dir(dir); 173 d_drop(dir); 174 res = simple_rmdir(parent, dir); 175 /* We have to give up the mm_struct */ 176 spu_forget(SPUFS_I(d_inode(dir))->i_ctx); 177 return res; 178 } 179 180 static int spufs_fill_dir(struct dentry *dir, 181 const struct spufs_tree_descr *files, umode_t mode, 182 struct spu_context *ctx) 183 { 184 while (files->name && files->name[0]) { 185 int ret; 186 struct dentry *dentry = d_alloc_name(dir, files->name); 187 if (!dentry) 188 return -ENOMEM; 189 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 190 files->mode & mode, files->size, ctx); 191 if (ret) 192 return ret; 193 files++; 194 } 195 return 0; 196 } 197 198 static int spufs_dir_close(struct inode *inode, struct file *file) 199 { 200 struct spu_context *ctx; 201 struct inode *parent; 202 struct dentry *dir; 203 int ret; 204 205 dir = file->f_path.dentry; 206 parent = d_inode(dir->d_parent); 207 ctx = SPUFS_I(d_inode(dir))->i_ctx; 208 209 inode_lock_nested(parent, I_MUTEX_PARENT); 210 ret = spufs_rmdir(parent, dir); 211 inode_unlock(parent); 212 WARN_ON(ret); 213 214 return dcache_dir_close(inode, file); 215 } 216 217 const struct file_operations spufs_context_fops = { 218 .open = dcache_dir_open, 219 .release = spufs_dir_close, 220 .llseek = dcache_dir_lseek, 221 .read = generic_read_dir, 222 .iterate_shared = dcache_readdir, 223 .fsync = noop_fsync, 224 }; 225 EXPORT_SYMBOL_GPL(spufs_context_fops); 226 227 static int 228 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 229 umode_t mode) 230 { 231 int ret; 232 struct inode *inode; 233 struct spu_context *ctx; 234 235 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 236 if (!inode) 237 return -ENOSPC; 238 239 if (dir->i_mode & S_ISGID) { 240 inode->i_gid = dir->i_gid; 241 inode->i_mode &= S_ISGID; 242 } 243 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 244 SPUFS_I(inode)->i_ctx = ctx; 245 if (!ctx) { 246 iput(inode); 247 return -ENOSPC; 248 } 249 250 ctx->flags = flags; 251 inode->i_op = &simple_dir_inode_operations; 252 inode->i_fop = &simple_dir_operations; 253 254 inode_lock(inode); 255 256 dget(dentry); 257 inc_nlink(dir); 258 inc_nlink(inode); 259 260 d_instantiate(dentry, inode); 261 262 if (flags & SPU_CREATE_NOSCHED) 263 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 264 mode, ctx); 265 else 266 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 267 268 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 269 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 270 mode, ctx); 271 272 if (ret) 273 spufs_rmdir(dir, dentry); 274 275 inode_unlock(inode); 276 277 return ret; 278 } 279 280 static int spufs_context_open(struct path *path) 281 { 282 int ret; 283 struct file *filp; 284 285 ret = get_unused_fd_flags(0); 286 if (ret < 0) 287 return ret; 288 289 filp = dentry_open(path, O_RDONLY, current_cred()); 290 if (IS_ERR(filp)) { 291 put_unused_fd(ret); 292 return PTR_ERR(filp); 293 } 294 295 filp->f_op = &spufs_context_fops; 296 fd_install(ret, filp); 297 return ret; 298 } 299 300 static struct spu_context * 301 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 302 struct file *filp) 303 { 304 struct spu_context *tmp, *neighbor, *err; 305 int count, node; 306 int aff_supp; 307 308 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 309 struct spu, cbe_list))->aff_list); 310 311 if (!aff_supp) 312 return ERR_PTR(-EINVAL); 313 314 if (flags & SPU_CREATE_GANG) 315 return ERR_PTR(-EINVAL); 316 317 if (flags & SPU_CREATE_AFFINITY_MEM && 318 gang->aff_ref_ctx && 319 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 320 return ERR_PTR(-EEXIST); 321 322 if (gang->aff_flags & AFF_MERGED) 323 return ERR_PTR(-EBUSY); 324 325 neighbor = NULL; 326 if (flags & SPU_CREATE_AFFINITY_SPU) { 327 if (!filp || filp->f_op != &spufs_context_fops) 328 return ERR_PTR(-EINVAL); 329 330 neighbor = get_spu_context( 331 SPUFS_I(file_inode(filp))->i_ctx); 332 333 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 334 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 335 !list_entry(neighbor->aff_list.next, struct spu_context, 336 aff_list)->aff_head) { 337 err = ERR_PTR(-EEXIST); 338 goto out_put_neighbor; 339 } 340 341 if (gang != neighbor->gang) { 342 err = ERR_PTR(-EINVAL); 343 goto out_put_neighbor; 344 } 345 346 count = 1; 347 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 348 count++; 349 if (list_empty(&neighbor->aff_list)) 350 count++; 351 352 for (node = 0; node < MAX_NUMNODES; node++) { 353 if ((cbe_spu_info[node].n_spus - atomic_read( 354 &cbe_spu_info[node].reserved_spus)) >= count) 355 break; 356 } 357 358 if (node == MAX_NUMNODES) { 359 err = ERR_PTR(-EEXIST); 360 goto out_put_neighbor; 361 } 362 } 363 364 return neighbor; 365 366 out_put_neighbor: 367 put_spu_context(neighbor); 368 return err; 369 } 370 371 static void 372 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 373 struct spu_context *neighbor) 374 { 375 if (flags & SPU_CREATE_AFFINITY_MEM) 376 ctx->gang->aff_ref_ctx = ctx; 377 378 if (flags & SPU_CREATE_AFFINITY_SPU) { 379 if (list_empty(&neighbor->aff_list)) { 380 list_add_tail(&neighbor->aff_list, 381 &ctx->gang->aff_list_head); 382 neighbor->aff_head = 1; 383 } 384 385 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 386 || list_entry(neighbor->aff_list.next, struct spu_context, 387 aff_list)->aff_head) { 388 list_add(&ctx->aff_list, &neighbor->aff_list); 389 } else { 390 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 391 if (neighbor->aff_head) { 392 neighbor->aff_head = 0; 393 ctx->aff_head = 1; 394 } 395 } 396 397 if (!ctx->gang->aff_ref_ctx) 398 ctx->gang->aff_ref_ctx = ctx; 399 } 400 } 401 402 static int 403 spufs_create_context(struct inode *inode, struct dentry *dentry, 404 struct vfsmount *mnt, int flags, umode_t mode, 405 struct file *aff_filp) 406 { 407 int ret; 408 int affinity; 409 struct spu_gang *gang; 410 struct spu_context *neighbor; 411 struct path path = {.mnt = mnt, .dentry = dentry}; 412 413 if ((flags & SPU_CREATE_NOSCHED) && 414 !capable(CAP_SYS_NICE)) 415 return -EPERM; 416 417 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 418 == SPU_CREATE_ISOLATE) 419 return -EINVAL; 420 421 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 422 return -ENODEV; 423 424 gang = NULL; 425 neighbor = NULL; 426 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 427 if (affinity) { 428 gang = SPUFS_I(inode)->i_gang; 429 if (!gang) 430 return -EINVAL; 431 mutex_lock(&gang->aff_mutex); 432 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 433 if (IS_ERR(neighbor)) { 434 ret = PTR_ERR(neighbor); 435 goto out_aff_unlock; 436 } 437 } 438 439 ret = spufs_mkdir(inode, dentry, flags, mode & 0777); 440 if (ret) 441 goto out_aff_unlock; 442 443 if (affinity) { 444 spufs_set_affinity(flags, SPUFS_I(d_inode(dentry))->i_ctx, 445 neighbor); 446 if (neighbor) 447 put_spu_context(neighbor); 448 } 449 450 ret = spufs_context_open(&path); 451 if (ret < 0) 452 WARN_ON(spufs_rmdir(inode, dentry)); 453 454 out_aff_unlock: 455 if (affinity) 456 mutex_unlock(&gang->aff_mutex); 457 return ret; 458 } 459 460 static int 461 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 462 { 463 int ret; 464 struct inode *inode; 465 struct spu_gang *gang; 466 467 ret = -ENOSPC; 468 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 469 if (!inode) 470 goto out; 471 472 ret = 0; 473 if (dir->i_mode & S_ISGID) { 474 inode->i_gid = dir->i_gid; 475 inode->i_mode &= S_ISGID; 476 } 477 gang = alloc_spu_gang(); 478 SPUFS_I(inode)->i_ctx = NULL; 479 SPUFS_I(inode)->i_gang = gang; 480 if (!gang) { 481 ret = -ENOMEM; 482 goto out_iput; 483 } 484 485 inode->i_op = &simple_dir_inode_operations; 486 inode->i_fop = &simple_dir_operations; 487 488 d_instantiate(dentry, inode); 489 inc_nlink(dir); 490 inc_nlink(d_inode(dentry)); 491 return ret; 492 493 out_iput: 494 iput(inode); 495 out: 496 return ret; 497 } 498 499 static int spufs_gang_open(struct path *path) 500 { 501 int ret; 502 struct file *filp; 503 504 ret = get_unused_fd_flags(0); 505 if (ret < 0) 506 return ret; 507 508 /* 509 * get references for dget and mntget, will be released 510 * in error path of *_open(). 511 */ 512 filp = dentry_open(path, O_RDONLY, current_cred()); 513 if (IS_ERR(filp)) { 514 put_unused_fd(ret); 515 return PTR_ERR(filp); 516 } 517 518 filp->f_op = &simple_dir_operations; 519 fd_install(ret, filp); 520 return ret; 521 } 522 523 static int spufs_create_gang(struct inode *inode, 524 struct dentry *dentry, 525 struct vfsmount *mnt, umode_t mode) 526 { 527 struct path path = {.mnt = mnt, .dentry = dentry}; 528 int ret; 529 530 ret = spufs_mkgang(inode, dentry, mode & 0777); 531 if (!ret) { 532 ret = spufs_gang_open(&path); 533 if (ret < 0) { 534 int err = simple_rmdir(inode, dentry); 535 WARN_ON(err); 536 } 537 } 538 return ret; 539 } 540 541 542 static struct file_system_type spufs_type; 543 544 long spufs_create(struct path *path, struct dentry *dentry, 545 unsigned int flags, umode_t mode, struct file *filp) 546 { 547 struct inode *dir = d_inode(path->dentry); 548 int ret; 549 550 /* check if we are on spufs */ 551 if (path->dentry->d_sb->s_type != &spufs_type) 552 return -EINVAL; 553 554 /* don't accept undefined flags */ 555 if (flags & (~SPU_CREATE_FLAG_ALL)) 556 return -EINVAL; 557 558 /* only threads can be underneath a gang */ 559 if (path->dentry != path->dentry->d_sb->s_root) 560 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 561 return -EINVAL; 562 563 mode &= ~current_umask(); 564 565 if (flags & SPU_CREATE_GANG) 566 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 567 else 568 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 569 filp); 570 if (ret >= 0) 571 fsnotify_mkdir(dir, dentry); 572 573 return ret; 574 } 575 576 /* File system initialization */ 577 enum { 578 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 579 }; 580 581 static const match_table_t spufs_tokens = { 582 { Opt_uid, "uid=%d" }, 583 { Opt_gid, "gid=%d" }, 584 { Opt_mode, "mode=%o" }, 585 { Opt_debug, "debug" }, 586 { Opt_err, NULL }, 587 }; 588 589 static int spufs_show_options(struct seq_file *m, struct dentry *root) 590 { 591 struct spufs_sb_info *sbi = spufs_get_sb_info(root->d_sb); 592 struct inode *inode = root->d_inode; 593 594 if (!uid_eq(inode->i_uid, GLOBAL_ROOT_UID)) 595 seq_printf(m, ",uid=%u", 596 from_kuid_munged(&init_user_ns, inode->i_uid)); 597 if (!gid_eq(inode->i_gid, GLOBAL_ROOT_GID)) 598 seq_printf(m, ",gid=%u", 599 from_kgid_munged(&init_user_ns, inode->i_gid)); 600 if ((inode->i_mode & S_IALLUGO) != 0775) 601 seq_printf(m, ",mode=%o", inode->i_mode); 602 if (sbi->debug) 603 seq_puts(m, ",debug"); 604 return 0; 605 } 606 607 static int 608 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 609 { 610 char *p; 611 substring_t args[MAX_OPT_ARGS]; 612 613 while ((p = strsep(&options, ",")) != NULL) { 614 int token, option; 615 616 if (!*p) 617 continue; 618 619 token = match_token(p, spufs_tokens, args); 620 switch (token) { 621 case Opt_uid: 622 if (match_int(&args[0], &option)) 623 return 0; 624 root->i_uid = make_kuid(current_user_ns(), option); 625 if (!uid_valid(root->i_uid)) 626 return 0; 627 break; 628 case Opt_gid: 629 if (match_int(&args[0], &option)) 630 return 0; 631 root->i_gid = make_kgid(current_user_ns(), option); 632 if (!gid_valid(root->i_gid)) 633 return 0; 634 break; 635 case Opt_mode: 636 if (match_octal(&args[0], &option)) 637 return 0; 638 root->i_mode = option | S_IFDIR; 639 break; 640 case Opt_debug: 641 spufs_get_sb_info(sb)->debug = 1; 642 break; 643 default: 644 return 0; 645 } 646 } 647 return 1; 648 } 649 650 static void spufs_exit_isolated_loader(void) 651 { 652 free_pages((unsigned long) isolated_loader, 653 get_order(isolated_loader_size)); 654 } 655 656 static void 657 spufs_init_isolated_loader(void) 658 { 659 struct device_node *dn; 660 const char *loader; 661 int size; 662 663 dn = of_find_node_by_path("/spu-isolation"); 664 if (!dn) 665 return; 666 667 loader = of_get_property(dn, "loader", &size); 668 if (!loader) 669 return; 670 671 /* the loader must be align on a 16 byte boundary */ 672 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 673 if (!isolated_loader) 674 return; 675 676 isolated_loader_size = size; 677 memcpy(isolated_loader, loader, size); 678 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 679 } 680 681 static int 682 spufs_create_root(struct super_block *sb, void *data) 683 { 684 struct inode *inode; 685 int ret; 686 687 ret = -ENODEV; 688 if (!spu_management_ops) 689 goto out; 690 691 ret = -ENOMEM; 692 inode = spufs_new_inode(sb, S_IFDIR | 0775); 693 if (!inode) 694 goto out; 695 696 inode->i_op = &simple_dir_inode_operations; 697 inode->i_fop = &simple_dir_operations; 698 SPUFS_I(inode)->i_ctx = NULL; 699 inc_nlink(inode); 700 701 ret = -EINVAL; 702 if (!spufs_parse_options(sb, data, inode)) 703 goto out_iput; 704 705 ret = -ENOMEM; 706 sb->s_root = d_make_root(inode); 707 if (!sb->s_root) 708 goto out; 709 710 return 0; 711 out_iput: 712 iput(inode); 713 out: 714 return ret; 715 } 716 717 static int 718 spufs_fill_super(struct super_block *sb, void *data, int silent) 719 { 720 struct spufs_sb_info *info; 721 static const struct super_operations s_ops = { 722 .alloc_inode = spufs_alloc_inode, 723 .free_inode = spufs_free_inode, 724 .statfs = simple_statfs, 725 .evict_inode = spufs_evict_inode, 726 .show_options = spufs_show_options, 727 }; 728 729 info = kzalloc(sizeof(*info), GFP_KERNEL); 730 if (!info) 731 return -ENOMEM; 732 733 sb->s_maxbytes = MAX_LFS_FILESIZE; 734 sb->s_blocksize = PAGE_SIZE; 735 sb->s_blocksize_bits = PAGE_SHIFT; 736 sb->s_magic = SPUFS_MAGIC; 737 sb->s_op = &s_ops; 738 sb->s_fs_info = info; 739 740 return spufs_create_root(sb, data); 741 } 742 743 static struct dentry * 744 spufs_mount(struct file_system_type *fstype, int flags, 745 const char *name, void *data) 746 { 747 return mount_single(fstype, flags, data, spufs_fill_super); 748 } 749 750 static struct file_system_type spufs_type = { 751 .owner = THIS_MODULE, 752 .name = "spufs", 753 .mount = spufs_mount, 754 .kill_sb = kill_litter_super, 755 }; 756 MODULE_ALIAS_FS("spufs"); 757 758 static int __init spufs_init(void) 759 { 760 int ret; 761 762 ret = -ENODEV; 763 if (!spu_management_ops) 764 goto out; 765 766 ret = -ENOMEM; 767 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 768 sizeof(struct spufs_inode_info), 0, 769 SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, spufs_init_once); 770 771 if (!spufs_inode_cache) 772 goto out; 773 ret = spu_sched_init(); 774 if (ret) 775 goto out_cache; 776 ret = register_spu_syscalls(&spufs_calls); 777 if (ret) 778 goto out_sched; 779 ret = register_filesystem(&spufs_type); 780 if (ret) 781 goto out_syscalls; 782 783 spufs_init_isolated_loader(); 784 785 return 0; 786 787 out_syscalls: 788 unregister_spu_syscalls(&spufs_calls); 789 out_sched: 790 spu_sched_exit(); 791 out_cache: 792 kmem_cache_destroy(spufs_inode_cache); 793 out: 794 return ret; 795 } 796 module_init(spufs_init); 797 798 static void __exit spufs_exit(void) 799 { 800 spu_sched_exit(); 801 spufs_exit_isolated_loader(); 802 unregister_spu_syscalls(&spufs_calls); 803 unregister_filesystem(&spufs_type); 804 kmem_cache_destroy(spufs_inode_cache); 805 } 806 module_exit(spufs_exit); 807 808 MODULE_LICENSE("GPL"); 809 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 810 811