1 2 /* 3 * SPU file system 4 * 5 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 6 * 7 * Author: Arnd Bergmann <arndb@de.ibm.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 */ 23 24 #include <linux/file.h> 25 #include <linux/fs.h> 26 #include <linux/fsnotify.h> 27 #include <linux/backing-dev.h> 28 #include <linux/init.h> 29 #include <linux/ioctl.h> 30 #include <linux/module.h> 31 #include <linux/mount.h> 32 #include <linux/namei.h> 33 #include <linux/pagemap.h> 34 #include <linux/poll.h> 35 #include <linux/slab.h> 36 #include <linux/parser.h> 37 38 #include <asm/prom.h> 39 #include <asm/spu.h> 40 #include <asm/spu_priv1.h> 41 #include <asm/uaccess.h> 42 43 #include "spufs.h" 44 45 struct spufs_sb_info { 46 int debug; 47 }; 48 49 static struct kmem_cache *spufs_inode_cache; 50 char *isolated_loader; 51 static int isolated_loader_size; 52 53 static struct spufs_sb_info *spufs_get_sb_info(struct super_block *sb) 54 { 55 return sb->s_fs_info; 56 } 57 58 static struct inode * 59 spufs_alloc_inode(struct super_block *sb) 60 { 61 struct spufs_inode_info *ei; 62 63 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 64 if (!ei) 65 return NULL; 66 67 ei->i_gang = NULL; 68 ei->i_ctx = NULL; 69 ei->i_openers = 0; 70 71 return &ei->vfs_inode; 72 } 73 74 static void spufs_i_callback(struct rcu_head *head) 75 { 76 struct inode *inode = container_of(head, struct inode, i_rcu); 77 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 78 } 79 80 static void spufs_destroy_inode(struct inode *inode) 81 { 82 call_rcu(&inode->i_rcu, spufs_i_callback); 83 } 84 85 static void 86 spufs_init_once(void *p) 87 { 88 struct spufs_inode_info *ei = p; 89 90 inode_init_once(&ei->vfs_inode); 91 } 92 93 static struct inode * 94 spufs_new_inode(struct super_block *sb, umode_t mode) 95 { 96 struct inode *inode; 97 98 inode = new_inode(sb); 99 if (!inode) 100 goto out; 101 102 inode->i_mode = mode; 103 inode->i_uid = current_fsuid(); 104 inode->i_gid = current_fsgid(); 105 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 106 out: 107 return inode; 108 } 109 110 static int 111 spufs_setattr(struct dentry *dentry, struct iattr *attr) 112 { 113 struct inode *inode = dentry->d_inode; 114 115 if ((attr->ia_valid & ATTR_SIZE) && 116 (attr->ia_size != inode->i_size)) 117 return -EINVAL; 118 setattr_copy(inode, attr); 119 mark_inode_dirty(inode); 120 return 0; 121 } 122 123 124 static int 125 spufs_new_file(struct super_block *sb, struct dentry *dentry, 126 const struct file_operations *fops, umode_t mode, 127 size_t size, struct spu_context *ctx) 128 { 129 static const struct inode_operations spufs_file_iops = { 130 .setattr = spufs_setattr, 131 }; 132 struct inode *inode; 133 int ret; 134 135 ret = -ENOSPC; 136 inode = spufs_new_inode(sb, S_IFREG | mode); 137 if (!inode) 138 goto out; 139 140 ret = 0; 141 inode->i_op = &spufs_file_iops; 142 inode->i_fop = fops; 143 inode->i_size = size; 144 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 145 d_add(dentry, inode); 146 out: 147 return ret; 148 } 149 150 static void 151 spufs_evict_inode(struct inode *inode) 152 { 153 struct spufs_inode_info *ei = SPUFS_I(inode); 154 clear_inode(inode); 155 if (ei->i_ctx) 156 put_spu_context(ei->i_ctx); 157 if (ei->i_gang) 158 put_spu_gang(ei->i_gang); 159 } 160 161 static void spufs_prune_dir(struct dentry *dir) 162 { 163 struct dentry *dentry, *tmp; 164 165 mutex_lock(&dir->d_inode->i_mutex); 166 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 167 spin_lock(&dentry->d_lock); 168 if (!(d_unhashed(dentry)) && dentry->d_inode) { 169 dget_dlock(dentry); 170 __d_drop(dentry); 171 spin_unlock(&dentry->d_lock); 172 simple_unlink(dir->d_inode, dentry); 173 /* XXX: what was dcache_lock protecting here? Other 174 * filesystems (IB, configfs) release dcache_lock 175 * before unlink */ 176 dput(dentry); 177 } else { 178 spin_unlock(&dentry->d_lock); 179 } 180 } 181 shrink_dcache_parent(dir); 182 mutex_unlock(&dir->d_inode->i_mutex); 183 } 184 185 /* Caller must hold parent->i_mutex */ 186 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 187 { 188 /* remove all entries */ 189 int res; 190 spufs_prune_dir(dir); 191 d_drop(dir); 192 res = simple_rmdir(parent, dir); 193 /* We have to give up the mm_struct */ 194 spu_forget(SPUFS_I(dir->d_inode)->i_ctx); 195 return res; 196 } 197 198 static int spufs_fill_dir(struct dentry *dir, 199 const struct spufs_tree_descr *files, umode_t mode, 200 struct spu_context *ctx) 201 { 202 while (files->name && files->name[0]) { 203 int ret; 204 struct dentry *dentry = d_alloc_name(dir, files->name); 205 if (!dentry) 206 return -ENOMEM; 207 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 208 files->mode & mode, files->size, ctx); 209 if (ret) 210 return ret; 211 files++; 212 } 213 return 0; 214 } 215 216 static int spufs_dir_close(struct inode *inode, struct file *file) 217 { 218 struct spu_context *ctx; 219 struct inode *parent; 220 struct dentry *dir; 221 int ret; 222 223 dir = file->f_path.dentry; 224 parent = dir->d_parent->d_inode; 225 ctx = SPUFS_I(dir->d_inode)->i_ctx; 226 227 mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); 228 ret = spufs_rmdir(parent, dir); 229 mutex_unlock(&parent->i_mutex); 230 WARN_ON(ret); 231 232 return dcache_dir_close(inode, file); 233 } 234 235 const struct file_operations spufs_context_fops = { 236 .open = dcache_dir_open, 237 .release = spufs_dir_close, 238 .llseek = dcache_dir_lseek, 239 .read = generic_read_dir, 240 .readdir = dcache_readdir, 241 .fsync = noop_fsync, 242 }; 243 EXPORT_SYMBOL_GPL(spufs_context_fops); 244 245 static int 246 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 247 umode_t mode) 248 { 249 int ret; 250 struct inode *inode; 251 struct spu_context *ctx; 252 253 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 254 if (!inode) 255 return -ENOSPC; 256 257 if (dir->i_mode & S_ISGID) { 258 inode->i_gid = dir->i_gid; 259 inode->i_mode &= S_ISGID; 260 } 261 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 262 SPUFS_I(inode)->i_ctx = ctx; 263 if (!ctx) { 264 iput(inode); 265 return -ENOSPC; 266 } 267 268 ctx->flags = flags; 269 inode->i_op = &simple_dir_inode_operations; 270 inode->i_fop = &simple_dir_operations; 271 272 mutex_lock(&inode->i_mutex); 273 274 dget(dentry); 275 inc_nlink(dir); 276 inc_nlink(inode); 277 278 d_instantiate(dentry, inode); 279 280 if (flags & SPU_CREATE_NOSCHED) 281 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 282 mode, ctx); 283 else 284 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 285 286 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 287 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 288 mode, ctx); 289 290 if (ret) 291 spufs_rmdir(dir, dentry); 292 293 mutex_unlock(&inode->i_mutex); 294 295 return ret; 296 } 297 298 static int spufs_context_open(struct path *path) 299 { 300 int ret; 301 struct file *filp; 302 303 ret = get_unused_fd(); 304 if (ret < 0) 305 return ret; 306 307 filp = dentry_open(path, O_RDONLY, current_cred()); 308 if (IS_ERR(filp)) { 309 put_unused_fd(ret); 310 return PTR_ERR(filp); 311 } 312 313 filp->f_op = &spufs_context_fops; 314 fd_install(ret, filp); 315 return ret; 316 } 317 318 static struct spu_context * 319 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 320 struct file *filp) 321 { 322 struct spu_context *tmp, *neighbor, *err; 323 int count, node; 324 int aff_supp; 325 326 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 327 struct spu, cbe_list))->aff_list); 328 329 if (!aff_supp) 330 return ERR_PTR(-EINVAL); 331 332 if (flags & SPU_CREATE_GANG) 333 return ERR_PTR(-EINVAL); 334 335 if (flags & SPU_CREATE_AFFINITY_MEM && 336 gang->aff_ref_ctx && 337 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 338 return ERR_PTR(-EEXIST); 339 340 if (gang->aff_flags & AFF_MERGED) 341 return ERR_PTR(-EBUSY); 342 343 neighbor = NULL; 344 if (flags & SPU_CREATE_AFFINITY_SPU) { 345 if (!filp || filp->f_op != &spufs_context_fops) 346 return ERR_PTR(-EINVAL); 347 348 neighbor = get_spu_context( 349 SPUFS_I(file_inode(filp))->i_ctx); 350 351 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 352 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 353 !list_entry(neighbor->aff_list.next, struct spu_context, 354 aff_list)->aff_head) { 355 err = ERR_PTR(-EEXIST); 356 goto out_put_neighbor; 357 } 358 359 if (gang != neighbor->gang) { 360 err = ERR_PTR(-EINVAL); 361 goto out_put_neighbor; 362 } 363 364 count = 1; 365 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 366 count++; 367 if (list_empty(&neighbor->aff_list)) 368 count++; 369 370 for (node = 0; node < MAX_NUMNODES; node++) { 371 if ((cbe_spu_info[node].n_spus - atomic_read( 372 &cbe_spu_info[node].reserved_spus)) >= count) 373 break; 374 } 375 376 if (node == MAX_NUMNODES) { 377 err = ERR_PTR(-EEXIST); 378 goto out_put_neighbor; 379 } 380 } 381 382 return neighbor; 383 384 out_put_neighbor: 385 put_spu_context(neighbor); 386 return err; 387 } 388 389 static void 390 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 391 struct spu_context *neighbor) 392 { 393 if (flags & SPU_CREATE_AFFINITY_MEM) 394 ctx->gang->aff_ref_ctx = ctx; 395 396 if (flags & SPU_CREATE_AFFINITY_SPU) { 397 if (list_empty(&neighbor->aff_list)) { 398 list_add_tail(&neighbor->aff_list, 399 &ctx->gang->aff_list_head); 400 neighbor->aff_head = 1; 401 } 402 403 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 404 || list_entry(neighbor->aff_list.next, struct spu_context, 405 aff_list)->aff_head) { 406 list_add(&ctx->aff_list, &neighbor->aff_list); 407 } else { 408 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 409 if (neighbor->aff_head) { 410 neighbor->aff_head = 0; 411 ctx->aff_head = 1; 412 } 413 } 414 415 if (!ctx->gang->aff_ref_ctx) 416 ctx->gang->aff_ref_ctx = ctx; 417 } 418 } 419 420 static int 421 spufs_create_context(struct inode *inode, struct dentry *dentry, 422 struct vfsmount *mnt, int flags, umode_t mode, 423 struct file *aff_filp) 424 { 425 int ret; 426 int affinity; 427 struct spu_gang *gang; 428 struct spu_context *neighbor; 429 struct path path = {.mnt = mnt, .dentry = dentry}; 430 431 if ((flags & SPU_CREATE_NOSCHED) && 432 !capable(CAP_SYS_NICE)) 433 return -EPERM; 434 435 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 436 == SPU_CREATE_ISOLATE) 437 return -EINVAL; 438 439 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 440 return -ENODEV; 441 442 gang = NULL; 443 neighbor = NULL; 444 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 445 if (affinity) { 446 gang = SPUFS_I(inode)->i_gang; 447 if (!gang) 448 return -EINVAL; 449 mutex_lock(&gang->aff_mutex); 450 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 451 if (IS_ERR(neighbor)) { 452 ret = PTR_ERR(neighbor); 453 goto out_aff_unlock; 454 } 455 } 456 457 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 458 if (ret) 459 goto out_aff_unlock; 460 461 if (affinity) { 462 spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 463 neighbor); 464 if (neighbor) 465 put_spu_context(neighbor); 466 } 467 468 ret = spufs_context_open(&path); 469 if (ret < 0) 470 WARN_ON(spufs_rmdir(inode, dentry)); 471 472 out_aff_unlock: 473 if (affinity) 474 mutex_unlock(&gang->aff_mutex); 475 return ret; 476 } 477 478 static int 479 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 480 { 481 int ret; 482 struct inode *inode; 483 struct spu_gang *gang; 484 485 ret = -ENOSPC; 486 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 487 if (!inode) 488 goto out; 489 490 ret = 0; 491 if (dir->i_mode & S_ISGID) { 492 inode->i_gid = dir->i_gid; 493 inode->i_mode &= S_ISGID; 494 } 495 gang = alloc_spu_gang(); 496 SPUFS_I(inode)->i_ctx = NULL; 497 SPUFS_I(inode)->i_gang = gang; 498 if (!gang) 499 goto out_iput; 500 501 inode->i_op = &simple_dir_inode_operations; 502 inode->i_fop = &simple_dir_operations; 503 504 d_instantiate(dentry, inode); 505 inc_nlink(dir); 506 inc_nlink(dentry->d_inode); 507 return ret; 508 509 out_iput: 510 iput(inode); 511 out: 512 return ret; 513 } 514 515 static int spufs_gang_open(struct path *path) 516 { 517 int ret; 518 struct file *filp; 519 520 ret = get_unused_fd(); 521 if (ret < 0) 522 return ret; 523 524 /* 525 * get references for dget and mntget, will be released 526 * in error path of *_open(). 527 */ 528 filp = dentry_open(path, O_RDONLY, current_cred()); 529 if (IS_ERR(filp)) { 530 put_unused_fd(ret); 531 return PTR_ERR(filp); 532 } 533 534 filp->f_op = &simple_dir_operations; 535 fd_install(ret, filp); 536 return ret; 537 } 538 539 static int spufs_create_gang(struct inode *inode, 540 struct dentry *dentry, 541 struct vfsmount *mnt, umode_t mode) 542 { 543 struct path path = {.mnt = mnt, .dentry = dentry}; 544 int ret; 545 546 ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 547 if (!ret) { 548 ret = spufs_gang_open(&path); 549 if (ret < 0) { 550 int err = simple_rmdir(inode, dentry); 551 WARN_ON(err); 552 } 553 } 554 return ret; 555 } 556 557 558 static struct file_system_type spufs_type; 559 560 long spufs_create(struct path *path, struct dentry *dentry, 561 unsigned int flags, umode_t mode, struct file *filp) 562 { 563 struct inode *dir = path->dentry->d_inode; 564 int ret; 565 566 /* check if we are on spufs */ 567 if (path->dentry->d_sb->s_type != &spufs_type) 568 return -EINVAL; 569 570 /* don't accept undefined flags */ 571 if (flags & (~SPU_CREATE_FLAG_ALL)) 572 return -EINVAL; 573 574 /* only threads can be underneath a gang */ 575 if (path->dentry != path->dentry->d_sb->s_root) 576 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 577 return -EINVAL; 578 579 mode &= ~current_umask(); 580 581 if (flags & SPU_CREATE_GANG) 582 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 583 else 584 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 585 filp); 586 if (ret >= 0) 587 fsnotify_mkdir(dir, dentry); 588 589 return ret; 590 } 591 592 /* File system initialization */ 593 enum { 594 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 595 }; 596 597 static const match_table_t spufs_tokens = { 598 { Opt_uid, "uid=%d" }, 599 { Opt_gid, "gid=%d" }, 600 { Opt_mode, "mode=%o" }, 601 { Opt_debug, "debug" }, 602 { Opt_err, NULL }, 603 }; 604 605 static int 606 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 607 { 608 char *p; 609 substring_t args[MAX_OPT_ARGS]; 610 611 while ((p = strsep(&options, ",")) != NULL) { 612 int token, option; 613 614 if (!*p) 615 continue; 616 617 token = match_token(p, spufs_tokens, args); 618 switch (token) { 619 case Opt_uid: 620 if (match_int(&args[0], &option)) 621 return 0; 622 root->i_uid = option; 623 break; 624 case Opt_gid: 625 if (match_int(&args[0], &option)) 626 return 0; 627 root->i_gid = option; 628 break; 629 case Opt_mode: 630 if (match_octal(&args[0], &option)) 631 return 0; 632 root->i_mode = option | S_IFDIR; 633 break; 634 case Opt_debug: 635 spufs_get_sb_info(sb)->debug = 1; 636 break; 637 default: 638 return 0; 639 } 640 } 641 return 1; 642 } 643 644 static void spufs_exit_isolated_loader(void) 645 { 646 free_pages((unsigned long) isolated_loader, 647 get_order(isolated_loader_size)); 648 } 649 650 static void 651 spufs_init_isolated_loader(void) 652 { 653 struct device_node *dn; 654 const char *loader; 655 int size; 656 657 dn = of_find_node_by_path("/spu-isolation"); 658 if (!dn) 659 return; 660 661 loader = of_get_property(dn, "loader", &size); 662 if (!loader) 663 return; 664 665 /* the loader must be align on a 16 byte boundary */ 666 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 667 if (!isolated_loader) 668 return; 669 670 isolated_loader_size = size; 671 memcpy(isolated_loader, loader, size); 672 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 673 } 674 675 static int 676 spufs_create_root(struct super_block *sb, void *data) 677 { 678 struct inode *inode; 679 int ret; 680 681 ret = -ENODEV; 682 if (!spu_management_ops) 683 goto out; 684 685 ret = -ENOMEM; 686 inode = spufs_new_inode(sb, S_IFDIR | 0775); 687 if (!inode) 688 goto out; 689 690 inode->i_op = &simple_dir_inode_operations; 691 inode->i_fop = &simple_dir_operations; 692 SPUFS_I(inode)->i_ctx = NULL; 693 inc_nlink(inode); 694 695 ret = -EINVAL; 696 if (!spufs_parse_options(sb, data, inode)) 697 goto out_iput; 698 699 ret = -ENOMEM; 700 sb->s_root = d_make_root(inode); 701 if (!sb->s_root) 702 goto out; 703 704 return 0; 705 out_iput: 706 iput(inode); 707 out: 708 return ret; 709 } 710 711 static int 712 spufs_fill_super(struct super_block *sb, void *data, int silent) 713 { 714 struct spufs_sb_info *info; 715 static const struct super_operations s_ops = { 716 .alloc_inode = spufs_alloc_inode, 717 .destroy_inode = spufs_destroy_inode, 718 .statfs = simple_statfs, 719 .evict_inode = spufs_evict_inode, 720 .show_options = generic_show_options, 721 }; 722 723 save_mount_options(sb, data); 724 725 info = kzalloc(sizeof(*info), GFP_KERNEL); 726 if (!info) 727 return -ENOMEM; 728 729 sb->s_maxbytes = MAX_LFS_FILESIZE; 730 sb->s_blocksize = PAGE_CACHE_SIZE; 731 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 732 sb->s_magic = SPUFS_MAGIC; 733 sb->s_op = &s_ops; 734 sb->s_fs_info = info; 735 736 return spufs_create_root(sb, data); 737 } 738 739 static struct dentry * 740 spufs_mount(struct file_system_type *fstype, int flags, 741 const char *name, void *data) 742 { 743 return mount_single(fstype, flags, data, spufs_fill_super); 744 } 745 746 static struct file_system_type spufs_type = { 747 .owner = THIS_MODULE, 748 .name = "spufs", 749 .mount = spufs_mount, 750 .kill_sb = kill_litter_super, 751 }; 752 MODULE_ALIAS_FS("spufs"); 753 754 static int __init spufs_init(void) 755 { 756 int ret; 757 758 ret = -ENODEV; 759 if (!spu_management_ops) 760 goto out; 761 762 ret = -ENOMEM; 763 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 764 sizeof(struct spufs_inode_info), 0, 765 SLAB_HWCACHE_ALIGN, spufs_init_once); 766 767 if (!spufs_inode_cache) 768 goto out; 769 ret = spu_sched_init(); 770 if (ret) 771 goto out_cache; 772 ret = register_spu_syscalls(&spufs_calls); 773 if (ret) 774 goto out_sched; 775 ret = register_filesystem(&spufs_type); 776 if (ret) 777 goto out_syscalls; 778 779 spufs_init_isolated_loader(); 780 781 return 0; 782 783 out_syscalls: 784 unregister_spu_syscalls(&spufs_calls); 785 out_sched: 786 spu_sched_exit(); 787 out_cache: 788 kmem_cache_destroy(spufs_inode_cache); 789 out: 790 return ret; 791 } 792 module_init(spufs_init); 793 794 static void __exit spufs_exit(void) 795 { 796 spu_sched_exit(); 797 spufs_exit_isolated_loader(); 798 unregister_spu_syscalls(&spufs_calls); 799 unregister_filesystem(&spufs_type); 800 kmem_cache_destroy(spufs_inode_cache); 801 } 802 module_exit(spufs_exit); 803 804 MODULE_LICENSE("GPL"); 805 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 806 807