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_ino = get_next_ino(); 103 inode->i_mode = mode; 104 inode->i_uid = current_fsuid(); 105 inode->i_gid = current_fsgid(); 106 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 107 out: 108 return inode; 109 } 110 111 static int 112 spufs_setattr(struct dentry *dentry, struct iattr *attr) 113 { 114 struct inode *inode = dentry->d_inode; 115 116 if ((attr->ia_valid & ATTR_SIZE) && 117 (attr->ia_size != inode->i_size)) 118 return -EINVAL; 119 setattr_copy(inode, attr); 120 mark_inode_dirty(inode); 121 return 0; 122 } 123 124 125 static int 126 spufs_new_file(struct super_block *sb, struct dentry *dentry, 127 const struct file_operations *fops, umode_t mode, 128 size_t size, struct spu_context *ctx) 129 { 130 static const struct inode_operations spufs_file_iops = { 131 .setattr = spufs_setattr, 132 }; 133 struct inode *inode; 134 int ret; 135 136 ret = -ENOSPC; 137 inode = spufs_new_inode(sb, S_IFREG | mode); 138 if (!inode) 139 goto out; 140 141 ret = 0; 142 inode->i_op = &spufs_file_iops; 143 inode->i_fop = fops; 144 inode->i_size = size; 145 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 146 d_add(dentry, inode); 147 out: 148 return ret; 149 } 150 151 static void 152 spufs_evict_inode(struct inode *inode) 153 { 154 struct spufs_inode_info *ei = SPUFS_I(inode); 155 clear_inode(inode); 156 if (ei->i_ctx) 157 put_spu_context(ei->i_ctx); 158 if (ei->i_gang) 159 put_spu_gang(ei->i_gang); 160 } 161 162 static void spufs_prune_dir(struct dentry *dir) 163 { 164 struct dentry *dentry, *tmp; 165 166 mutex_lock(&dir->d_inode->i_mutex); 167 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { 168 spin_lock(&dentry->d_lock); 169 if (!(d_unhashed(dentry)) && dentry->d_inode) { 170 dget_dlock(dentry); 171 __d_drop(dentry); 172 spin_unlock(&dentry->d_lock); 173 simple_unlink(dir->d_inode, dentry); 174 /* XXX: what was dcache_lock protecting here? Other 175 * filesystems (IB, configfs) release dcache_lock 176 * before unlink */ 177 dput(dentry); 178 } else { 179 spin_unlock(&dentry->d_lock); 180 } 181 } 182 shrink_dcache_parent(dir); 183 mutex_unlock(&dir->d_inode->i_mutex); 184 } 185 186 /* Caller must hold parent->i_mutex */ 187 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 188 { 189 /* remove all entries */ 190 int res; 191 spufs_prune_dir(dir); 192 d_drop(dir); 193 res = simple_rmdir(parent, dir); 194 /* We have to give up the mm_struct */ 195 spu_forget(SPUFS_I(dir->d_inode)->i_ctx); 196 return res; 197 } 198 199 static int spufs_fill_dir(struct dentry *dir, 200 const struct spufs_tree_descr *files, umode_t mode, 201 struct spu_context *ctx) 202 { 203 while (files->name && files->name[0]) { 204 int ret; 205 struct dentry *dentry = d_alloc_name(dir, files->name); 206 if (!dentry) 207 return -ENOMEM; 208 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 209 files->mode & mode, files->size, ctx); 210 if (ret) 211 return ret; 212 files++; 213 } 214 return 0; 215 } 216 217 static int spufs_dir_close(struct inode *inode, struct file *file) 218 { 219 struct spu_context *ctx; 220 struct inode *parent; 221 struct dentry *dir; 222 int ret; 223 224 dir = file->f_path.dentry; 225 parent = dir->d_parent->d_inode; 226 ctx = SPUFS_I(dir->d_inode)->i_ctx; 227 228 mutex_lock_nested(&parent->i_mutex, I_MUTEX_PARENT); 229 ret = spufs_rmdir(parent, dir); 230 mutex_unlock(&parent->i_mutex); 231 WARN_ON(ret); 232 233 return dcache_dir_close(inode, file); 234 } 235 236 const struct file_operations spufs_context_fops = { 237 .open = dcache_dir_open, 238 .release = spufs_dir_close, 239 .llseek = dcache_dir_lseek, 240 .read = generic_read_dir, 241 .iterate = dcache_readdir, 242 .fsync = noop_fsync, 243 }; 244 EXPORT_SYMBOL_GPL(spufs_context_fops); 245 246 static int 247 spufs_mkdir(struct inode *dir, struct dentry *dentry, unsigned int flags, 248 umode_t mode) 249 { 250 int ret; 251 struct inode *inode; 252 struct spu_context *ctx; 253 254 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 255 if (!inode) 256 return -ENOSPC; 257 258 if (dir->i_mode & S_ISGID) { 259 inode->i_gid = dir->i_gid; 260 inode->i_mode &= S_ISGID; 261 } 262 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 263 SPUFS_I(inode)->i_ctx = ctx; 264 if (!ctx) { 265 iput(inode); 266 return -ENOSPC; 267 } 268 269 ctx->flags = flags; 270 inode->i_op = &simple_dir_inode_operations; 271 inode->i_fop = &simple_dir_operations; 272 273 mutex_lock(&inode->i_mutex); 274 275 dget(dentry); 276 inc_nlink(dir); 277 inc_nlink(inode); 278 279 d_instantiate(dentry, inode); 280 281 if (flags & SPU_CREATE_NOSCHED) 282 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 283 mode, ctx); 284 else 285 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 286 287 if (!ret && spufs_get_sb_info(dir->i_sb)->debug) 288 ret = spufs_fill_dir(dentry, spufs_dir_debug_contents, 289 mode, ctx); 290 291 if (ret) 292 spufs_rmdir(dir, dentry); 293 294 mutex_unlock(&inode->i_mutex); 295 296 return ret; 297 } 298 299 static int spufs_context_open(struct path *path) 300 { 301 int ret; 302 struct file *filp; 303 304 ret = get_unused_fd_flags(0); 305 if (ret < 0) 306 return ret; 307 308 filp = dentry_open(path, O_RDONLY, current_cred()); 309 if (IS_ERR(filp)) { 310 put_unused_fd(ret); 311 return PTR_ERR(filp); 312 } 313 314 filp->f_op = &spufs_context_fops; 315 fd_install(ret, filp); 316 return ret; 317 } 318 319 static struct spu_context * 320 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 321 struct file *filp) 322 { 323 struct spu_context *tmp, *neighbor, *err; 324 int count, node; 325 int aff_supp; 326 327 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 328 struct spu, cbe_list))->aff_list); 329 330 if (!aff_supp) 331 return ERR_PTR(-EINVAL); 332 333 if (flags & SPU_CREATE_GANG) 334 return ERR_PTR(-EINVAL); 335 336 if (flags & SPU_CREATE_AFFINITY_MEM && 337 gang->aff_ref_ctx && 338 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 339 return ERR_PTR(-EEXIST); 340 341 if (gang->aff_flags & AFF_MERGED) 342 return ERR_PTR(-EBUSY); 343 344 neighbor = NULL; 345 if (flags & SPU_CREATE_AFFINITY_SPU) { 346 if (!filp || filp->f_op != &spufs_context_fops) 347 return ERR_PTR(-EINVAL); 348 349 neighbor = get_spu_context( 350 SPUFS_I(file_inode(filp))->i_ctx); 351 352 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 353 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 354 !list_entry(neighbor->aff_list.next, struct spu_context, 355 aff_list)->aff_head) { 356 err = ERR_PTR(-EEXIST); 357 goto out_put_neighbor; 358 } 359 360 if (gang != neighbor->gang) { 361 err = ERR_PTR(-EINVAL); 362 goto out_put_neighbor; 363 } 364 365 count = 1; 366 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 367 count++; 368 if (list_empty(&neighbor->aff_list)) 369 count++; 370 371 for (node = 0; node < MAX_NUMNODES; node++) { 372 if ((cbe_spu_info[node].n_spus - atomic_read( 373 &cbe_spu_info[node].reserved_spus)) >= count) 374 break; 375 } 376 377 if (node == MAX_NUMNODES) { 378 err = ERR_PTR(-EEXIST); 379 goto out_put_neighbor; 380 } 381 } 382 383 return neighbor; 384 385 out_put_neighbor: 386 put_spu_context(neighbor); 387 return err; 388 } 389 390 static void 391 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 392 struct spu_context *neighbor) 393 { 394 if (flags & SPU_CREATE_AFFINITY_MEM) 395 ctx->gang->aff_ref_ctx = ctx; 396 397 if (flags & SPU_CREATE_AFFINITY_SPU) { 398 if (list_empty(&neighbor->aff_list)) { 399 list_add_tail(&neighbor->aff_list, 400 &ctx->gang->aff_list_head); 401 neighbor->aff_head = 1; 402 } 403 404 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 405 || list_entry(neighbor->aff_list.next, struct spu_context, 406 aff_list)->aff_head) { 407 list_add(&ctx->aff_list, &neighbor->aff_list); 408 } else { 409 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 410 if (neighbor->aff_head) { 411 neighbor->aff_head = 0; 412 ctx->aff_head = 1; 413 } 414 } 415 416 if (!ctx->gang->aff_ref_ctx) 417 ctx->gang->aff_ref_ctx = ctx; 418 } 419 } 420 421 static int 422 spufs_create_context(struct inode *inode, struct dentry *dentry, 423 struct vfsmount *mnt, int flags, umode_t mode, 424 struct file *aff_filp) 425 { 426 int ret; 427 int affinity; 428 struct spu_gang *gang; 429 struct spu_context *neighbor; 430 struct path path = {.mnt = mnt, .dentry = dentry}; 431 432 if ((flags & SPU_CREATE_NOSCHED) && 433 !capable(CAP_SYS_NICE)) 434 return -EPERM; 435 436 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 437 == SPU_CREATE_ISOLATE) 438 return -EINVAL; 439 440 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 441 return -ENODEV; 442 443 gang = NULL; 444 neighbor = NULL; 445 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 446 if (affinity) { 447 gang = SPUFS_I(inode)->i_gang; 448 if (!gang) 449 return -EINVAL; 450 mutex_lock(&gang->aff_mutex); 451 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 452 if (IS_ERR(neighbor)) { 453 ret = PTR_ERR(neighbor); 454 goto out_aff_unlock; 455 } 456 } 457 458 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 459 if (ret) 460 goto out_aff_unlock; 461 462 if (affinity) { 463 spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 464 neighbor); 465 if (neighbor) 466 put_spu_context(neighbor); 467 } 468 469 ret = spufs_context_open(&path); 470 if (ret < 0) 471 WARN_ON(spufs_rmdir(inode, dentry)); 472 473 out_aff_unlock: 474 if (affinity) 475 mutex_unlock(&gang->aff_mutex); 476 return ret; 477 } 478 479 static int 480 spufs_mkgang(struct inode *dir, struct dentry *dentry, umode_t mode) 481 { 482 int ret; 483 struct inode *inode; 484 struct spu_gang *gang; 485 486 ret = -ENOSPC; 487 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 488 if (!inode) 489 goto out; 490 491 ret = 0; 492 if (dir->i_mode & S_ISGID) { 493 inode->i_gid = dir->i_gid; 494 inode->i_mode &= S_ISGID; 495 } 496 gang = alloc_spu_gang(); 497 SPUFS_I(inode)->i_ctx = NULL; 498 SPUFS_I(inode)->i_gang = gang; 499 if (!gang) 500 goto out_iput; 501 502 inode->i_op = &simple_dir_inode_operations; 503 inode->i_fop = &simple_dir_operations; 504 505 d_instantiate(dentry, inode); 506 inc_nlink(dir); 507 inc_nlink(dentry->d_inode); 508 return ret; 509 510 out_iput: 511 iput(inode); 512 out: 513 return ret; 514 } 515 516 static int spufs_gang_open(struct path *path) 517 { 518 int ret; 519 struct file *filp; 520 521 ret = get_unused_fd_flags(0); 522 if (ret < 0) 523 return ret; 524 525 /* 526 * get references for dget and mntget, will be released 527 * in error path of *_open(). 528 */ 529 filp = dentry_open(path, O_RDONLY, current_cred()); 530 if (IS_ERR(filp)) { 531 put_unused_fd(ret); 532 return PTR_ERR(filp); 533 } 534 535 filp->f_op = &simple_dir_operations; 536 fd_install(ret, filp); 537 return ret; 538 } 539 540 static int spufs_create_gang(struct inode *inode, 541 struct dentry *dentry, 542 struct vfsmount *mnt, umode_t mode) 543 { 544 struct path path = {.mnt = mnt, .dentry = dentry}; 545 int ret; 546 547 ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 548 if (!ret) { 549 ret = spufs_gang_open(&path); 550 if (ret < 0) { 551 int err = simple_rmdir(inode, dentry); 552 WARN_ON(err); 553 } 554 } 555 return ret; 556 } 557 558 559 static struct file_system_type spufs_type; 560 561 long spufs_create(struct path *path, struct dentry *dentry, 562 unsigned int flags, umode_t mode, struct file *filp) 563 { 564 struct inode *dir = path->dentry->d_inode; 565 int ret; 566 567 /* check if we are on spufs */ 568 if (path->dentry->d_sb->s_type != &spufs_type) 569 return -EINVAL; 570 571 /* don't accept undefined flags */ 572 if (flags & (~SPU_CREATE_FLAG_ALL)) 573 return -EINVAL; 574 575 /* only threads can be underneath a gang */ 576 if (path->dentry != path->dentry->d_sb->s_root) 577 if ((flags & SPU_CREATE_GANG) || !SPUFS_I(dir)->i_gang) 578 return -EINVAL; 579 580 mode &= ~current_umask(); 581 582 if (flags & SPU_CREATE_GANG) 583 ret = spufs_create_gang(dir, dentry, path->mnt, mode); 584 else 585 ret = spufs_create_context(dir, dentry, path->mnt, flags, mode, 586 filp); 587 if (ret >= 0) 588 fsnotify_mkdir(dir, dentry); 589 590 return ret; 591 } 592 593 /* File system initialization */ 594 enum { 595 Opt_uid, Opt_gid, Opt_mode, Opt_debug, Opt_err, 596 }; 597 598 static const match_table_t spufs_tokens = { 599 { Opt_uid, "uid=%d" }, 600 { Opt_gid, "gid=%d" }, 601 { Opt_mode, "mode=%o" }, 602 { Opt_debug, "debug" }, 603 { Opt_err, NULL }, 604 }; 605 606 static int 607 spufs_parse_options(struct super_block *sb, char *options, struct inode *root) 608 { 609 char *p; 610 substring_t args[MAX_OPT_ARGS]; 611 612 while ((p = strsep(&options, ",")) != NULL) { 613 int token, option; 614 615 if (!*p) 616 continue; 617 618 token = match_token(p, spufs_tokens, args); 619 switch (token) { 620 case Opt_uid: 621 if (match_int(&args[0], &option)) 622 return 0; 623 root->i_uid = make_kuid(current_user_ns(), option); 624 if (!uid_valid(root->i_uid)) 625 return 0; 626 break; 627 case Opt_gid: 628 if (match_int(&args[0], &option)) 629 return 0; 630 root->i_gid = make_kgid(current_user_ns(), option); 631 if (!gid_valid(root->i_gid)) 632 return 0; 633 break; 634 case Opt_mode: 635 if (match_octal(&args[0], &option)) 636 return 0; 637 root->i_mode = option | S_IFDIR; 638 break; 639 case Opt_debug: 640 spufs_get_sb_info(sb)->debug = 1; 641 break; 642 default: 643 return 0; 644 } 645 } 646 return 1; 647 } 648 649 static void spufs_exit_isolated_loader(void) 650 { 651 free_pages((unsigned long) isolated_loader, 652 get_order(isolated_loader_size)); 653 } 654 655 static void 656 spufs_init_isolated_loader(void) 657 { 658 struct device_node *dn; 659 const char *loader; 660 int size; 661 662 dn = of_find_node_by_path("/spu-isolation"); 663 if (!dn) 664 return; 665 666 loader = of_get_property(dn, "loader", &size); 667 if (!loader) 668 return; 669 670 /* the loader must be align on a 16 byte boundary */ 671 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 672 if (!isolated_loader) 673 return; 674 675 isolated_loader_size = size; 676 memcpy(isolated_loader, loader, size); 677 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 678 } 679 680 static int 681 spufs_create_root(struct super_block *sb, void *data) 682 { 683 struct inode *inode; 684 int ret; 685 686 ret = -ENODEV; 687 if (!spu_management_ops) 688 goto out; 689 690 ret = -ENOMEM; 691 inode = spufs_new_inode(sb, S_IFDIR | 0775); 692 if (!inode) 693 goto out; 694 695 inode->i_op = &simple_dir_inode_operations; 696 inode->i_fop = &simple_dir_operations; 697 SPUFS_I(inode)->i_ctx = NULL; 698 inc_nlink(inode); 699 700 ret = -EINVAL; 701 if (!spufs_parse_options(sb, data, inode)) 702 goto out_iput; 703 704 ret = -ENOMEM; 705 sb->s_root = d_make_root(inode); 706 if (!sb->s_root) 707 goto out; 708 709 return 0; 710 out_iput: 711 iput(inode); 712 out: 713 return ret; 714 } 715 716 static int 717 spufs_fill_super(struct super_block *sb, void *data, int silent) 718 { 719 struct spufs_sb_info *info; 720 static const struct super_operations s_ops = { 721 .alloc_inode = spufs_alloc_inode, 722 .destroy_inode = spufs_destroy_inode, 723 .statfs = simple_statfs, 724 .evict_inode = spufs_evict_inode, 725 .show_options = generic_show_options, 726 }; 727 728 save_mount_options(sb, data); 729 730 info = kzalloc(sizeof(*info), GFP_KERNEL); 731 if (!info) 732 return -ENOMEM; 733 734 sb->s_maxbytes = MAX_LFS_FILESIZE; 735 sb->s_blocksize = PAGE_CACHE_SIZE; 736 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 737 sb->s_magic = SPUFS_MAGIC; 738 sb->s_op = &s_ops; 739 sb->s_fs_info = info; 740 741 return spufs_create_root(sb, data); 742 } 743 744 static struct dentry * 745 spufs_mount(struct file_system_type *fstype, int flags, 746 const char *name, void *data) 747 { 748 return mount_single(fstype, flags, data, spufs_fill_super); 749 } 750 751 static struct file_system_type spufs_type = { 752 .owner = THIS_MODULE, 753 .name = "spufs", 754 .mount = spufs_mount, 755 .kill_sb = kill_litter_super, 756 }; 757 MODULE_ALIAS_FS("spufs"); 758 759 static int __init spufs_init(void) 760 { 761 int ret; 762 763 ret = -ENODEV; 764 if (!spu_management_ops) 765 goto out; 766 767 ret = -ENOMEM; 768 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 769 sizeof(struct spufs_inode_info), 0, 770 SLAB_HWCACHE_ALIGN, spufs_init_once); 771 772 if (!spufs_inode_cache) 773 goto out; 774 ret = spu_sched_init(); 775 if (ret) 776 goto out_cache; 777 ret = register_spu_syscalls(&spufs_calls); 778 if (ret) 779 goto out_sched; 780 ret = register_filesystem(&spufs_type); 781 if (ret) 782 goto out_syscalls; 783 784 spufs_init_isolated_loader(); 785 786 return 0; 787 788 out_syscalls: 789 unregister_spu_syscalls(&spufs_calls); 790 out_sched: 791 spu_sched_exit(); 792 out_cache: 793 kmem_cache_destroy(spufs_inode_cache); 794 out: 795 return ret; 796 } 797 module_init(spufs_init); 798 799 static void __exit spufs_exit(void) 800 { 801 spu_sched_exit(); 802 spufs_exit_isolated_loader(); 803 unregister_spu_syscalls(&spufs_calls); 804 unregister_filesystem(&spufs_type); 805 kmem_cache_destroy(spufs_inode_cache); 806 } 807 module_exit(spufs_exit); 808 809 MODULE_LICENSE("GPL"); 810 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 811 812