1 /* 2 * SPU file system 3 * 4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005 5 * 6 * Author: Arnd Bergmann <arndb@de.ibm.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2, or (at your option) 11 * any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 */ 22 23 #include <linux/file.h> 24 #include <linux/fs.h> 25 #include <linux/backing-dev.h> 26 #include <linux/init.h> 27 #include <linux/ioctl.h> 28 #include <linux/module.h> 29 #include <linux/mount.h> 30 #include <linux/namei.h> 31 #include <linux/pagemap.h> 32 #include <linux/poll.h> 33 #include <linux/slab.h> 34 #include <linux/parser.h> 35 36 #include <asm/prom.h> 37 #include <asm/semaphore.h> 38 #include <asm/spu.h> 39 #include <asm/spu_priv1.h> 40 #include <asm/uaccess.h> 41 42 #include "spufs.h" 43 44 static struct kmem_cache *spufs_inode_cache; 45 char *isolated_loader; 46 static int isolated_loader_size; 47 48 static struct inode * 49 spufs_alloc_inode(struct super_block *sb) 50 { 51 struct spufs_inode_info *ei; 52 53 ei = kmem_cache_alloc(spufs_inode_cache, GFP_KERNEL); 54 if (!ei) 55 return NULL; 56 57 ei->i_gang = NULL; 58 ei->i_ctx = NULL; 59 ei->i_openers = 0; 60 61 return &ei->vfs_inode; 62 } 63 64 static void 65 spufs_destroy_inode(struct inode *inode) 66 { 67 kmem_cache_free(spufs_inode_cache, SPUFS_I(inode)); 68 } 69 70 static void 71 spufs_init_once(struct kmem_cache *cachep, void *p) 72 { 73 struct spufs_inode_info *ei = p; 74 75 inode_init_once(&ei->vfs_inode); 76 } 77 78 static struct inode * 79 spufs_new_inode(struct super_block *sb, int mode) 80 { 81 struct inode *inode; 82 83 inode = new_inode(sb); 84 if (!inode) 85 goto out; 86 87 inode->i_mode = mode; 88 inode->i_uid = current->fsuid; 89 inode->i_gid = current->fsgid; 90 inode->i_blocks = 0; 91 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; 92 out: 93 return inode; 94 } 95 96 static int 97 spufs_setattr(struct dentry *dentry, struct iattr *attr) 98 { 99 struct inode *inode = dentry->d_inode; 100 101 if ((attr->ia_valid & ATTR_SIZE) && 102 (attr->ia_size != inode->i_size)) 103 return -EINVAL; 104 return inode_setattr(inode, attr); 105 } 106 107 108 static int 109 spufs_new_file(struct super_block *sb, struct dentry *dentry, 110 const struct file_operations *fops, int mode, 111 struct spu_context *ctx) 112 { 113 static struct inode_operations spufs_file_iops = { 114 .setattr = spufs_setattr, 115 }; 116 struct inode *inode; 117 int ret; 118 119 ret = -ENOSPC; 120 inode = spufs_new_inode(sb, S_IFREG | mode); 121 if (!inode) 122 goto out; 123 124 ret = 0; 125 inode->i_op = &spufs_file_iops; 126 inode->i_fop = fops; 127 inode->i_private = SPUFS_I(inode)->i_ctx = get_spu_context(ctx); 128 d_add(dentry, inode); 129 out: 130 return ret; 131 } 132 133 static void 134 spufs_delete_inode(struct inode *inode) 135 { 136 struct spufs_inode_info *ei = SPUFS_I(inode); 137 138 if (ei->i_ctx) 139 put_spu_context(ei->i_ctx); 140 if (ei->i_gang) 141 put_spu_gang(ei->i_gang); 142 clear_inode(inode); 143 } 144 145 static void spufs_prune_dir(struct dentry *dir) 146 { 147 struct dentry *dentry, *tmp; 148 149 mutex_lock(&dir->d_inode->i_mutex); 150 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 151 spin_lock(&dcache_lock); 152 spin_lock(&dentry->d_lock); 153 if (!(d_unhashed(dentry)) && dentry->d_inode) { 154 dget_locked(dentry); 155 __d_drop(dentry); 156 spin_unlock(&dentry->d_lock); 157 simple_unlink(dir->d_inode, dentry); 158 spin_unlock(&dcache_lock); 159 dput(dentry); 160 } else { 161 spin_unlock(&dentry->d_lock); 162 spin_unlock(&dcache_lock); 163 } 164 } 165 shrink_dcache_parent(dir); 166 mutex_unlock(&dir->d_inode->i_mutex); 167 } 168 169 /* Caller must hold parent->i_mutex */ 170 static int spufs_rmdir(struct inode *parent, struct dentry *dir) 171 { 172 /* remove all entries */ 173 spufs_prune_dir(dir); 174 175 return simple_rmdir(parent, dir); 176 } 177 178 static int spufs_fill_dir(struct dentry *dir, struct tree_descr *files, 179 int mode, struct spu_context *ctx) 180 { 181 struct dentry *dentry, *tmp; 182 int ret; 183 184 while (files->name && files->name[0]) { 185 ret = -ENOMEM; 186 dentry = d_alloc_name(dir, files->name); 187 if (!dentry) 188 goto out; 189 ret = spufs_new_file(dir->d_sb, dentry, files->ops, 190 files->mode & mode, ctx); 191 if (ret) 192 goto out; 193 files++; 194 } 195 return 0; 196 out: 197 /* 198 * remove all children from dir. dir->inode is not set so don't 199 * just simply use spufs_prune_dir() and panic afterwards :) 200 * dput() looks like it will do the right thing: 201 * - dec parent's ref counter 202 * - remove child from parent's child list 203 * - free child's inode if possible 204 * - free child 205 */ 206 list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_u.d_child) { 207 dput(dentry); 208 } 209 210 shrink_dcache_parent(dir); 211 return ret; 212 } 213 214 static int spufs_dir_close(struct inode *inode, struct file *file) 215 { 216 struct spu_context *ctx; 217 struct inode *parent; 218 struct dentry *dir; 219 int ret; 220 221 dir = file->f_path.dentry; 222 parent = dir->d_parent->d_inode; 223 ctx = SPUFS_I(dir->d_inode)->i_ctx; 224 225 mutex_lock(&parent->i_mutex); 226 ret = spufs_rmdir(parent, dir); 227 mutex_unlock(&parent->i_mutex); 228 WARN_ON(ret); 229 230 /* We have to give up the mm_struct */ 231 spu_forget(ctx); 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 .readdir = dcache_readdir, 242 .fsync = simple_sync_file, 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 int mode) 249 { 250 int ret; 251 struct inode *inode; 252 struct spu_context *ctx; 253 254 ret = -ENOSPC; 255 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 256 if (!inode) 257 goto out; 258 259 if (dir->i_mode & S_ISGID) { 260 inode->i_gid = dir->i_gid; 261 inode->i_mode &= S_ISGID; 262 } 263 ctx = alloc_spu_context(SPUFS_I(dir)->i_gang); /* XXX gang */ 264 SPUFS_I(inode)->i_ctx = ctx; 265 if (!ctx) 266 goto out_iput; 267 268 ctx->flags = flags; 269 inode->i_op = &simple_dir_inode_operations; 270 inode->i_fop = &simple_dir_operations; 271 if (flags & SPU_CREATE_NOSCHED) 272 ret = spufs_fill_dir(dentry, spufs_dir_nosched_contents, 273 mode, ctx); 274 else 275 ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx); 276 277 if (ret) 278 goto out_free_ctx; 279 280 d_instantiate(dentry, inode); 281 dget(dentry); 282 dir->i_nlink++; 283 dentry->d_inode->i_nlink++; 284 goto out; 285 286 out_free_ctx: 287 spu_forget(ctx); 288 put_spu_context(ctx); 289 out_iput: 290 iput(inode); 291 out: 292 return ret; 293 } 294 295 static int spufs_context_open(struct dentry *dentry, struct vfsmount *mnt) 296 { 297 int ret; 298 struct file *filp; 299 300 ret = get_unused_fd(); 301 if (ret < 0) { 302 dput(dentry); 303 mntput(mnt); 304 goto out; 305 } 306 307 filp = dentry_open(dentry, mnt, O_RDONLY); 308 if (IS_ERR(filp)) { 309 put_unused_fd(ret); 310 ret = PTR_ERR(filp); 311 goto out; 312 } 313 314 filp->f_op = &spufs_context_fops; 315 fd_install(ret, filp); 316 out: 317 return ret; 318 } 319 320 static struct spu_context * 321 spufs_assert_affinity(unsigned int flags, struct spu_gang *gang, 322 struct file *filp) 323 { 324 struct spu_context *tmp, *neighbor; 325 int count, node; 326 int aff_supp; 327 328 aff_supp = !list_empty(&(list_entry(cbe_spu_info[0].spus.next, 329 struct spu, cbe_list))->aff_list); 330 331 if (!aff_supp) 332 return ERR_PTR(-EINVAL); 333 334 if (flags & SPU_CREATE_GANG) 335 return ERR_PTR(-EINVAL); 336 337 if (flags & SPU_CREATE_AFFINITY_MEM && 338 gang->aff_ref_ctx && 339 gang->aff_ref_ctx->flags & SPU_CREATE_AFFINITY_MEM) 340 return ERR_PTR(-EEXIST); 341 342 if (gang->aff_flags & AFF_MERGED) 343 return ERR_PTR(-EBUSY); 344 345 neighbor = NULL; 346 if (flags & SPU_CREATE_AFFINITY_SPU) { 347 if (!filp || filp->f_op != &spufs_context_fops) 348 return ERR_PTR(-EINVAL); 349 350 neighbor = get_spu_context( 351 SPUFS_I(filp->f_dentry->d_inode)->i_ctx); 352 353 if (!list_empty(&neighbor->aff_list) && !(neighbor->aff_head) && 354 !list_is_last(&neighbor->aff_list, &gang->aff_list_head) && 355 !list_entry(neighbor->aff_list.next, struct spu_context, 356 aff_list)->aff_head) 357 return ERR_PTR(-EEXIST); 358 359 if (gang != neighbor->gang) 360 return ERR_PTR(-EINVAL); 361 362 count = 1; 363 list_for_each_entry(tmp, &gang->aff_list_head, aff_list) 364 count++; 365 if (list_empty(&neighbor->aff_list)) 366 count++; 367 368 for (node = 0; node < MAX_NUMNODES; node++) { 369 if ((cbe_spu_info[node].n_spus - atomic_read( 370 &cbe_spu_info[node].reserved_spus)) >= count) 371 break; 372 } 373 374 if (node == MAX_NUMNODES) 375 return ERR_PTR(-EEXIST); 376 } 377 378 return neighbor; 379 } 380 381 static void 382 spufs_set_affinity(unsigned int flags, struct spu_context *ctx, 383 struct spu_context *neighbor) 384 { 385 if (flags & SPU_CREATE_AFFINITY_MEM) 386 ctx->gang->aff_ref_ctx = ctx; 387 388 if (flags & SPU_CREATE_AFFINITY_SPU) { 389 if (list_empty(&neighbor->aff_list)) { 390 list_add_tail(&neighbor->aff_list, 391 &ctx->gang->aff_list_head); 392 neighbor->aff_head = 1; 393 } 394 395 if (list_is_last(&neighbor->aff_list, &ctx->gang->aff_list_head) 396 || list_entry(neighbor->aff_list.next, struct spu_context, 397 aff_list)->aff_head) { 398 list_add(&ctx->aff_list, &neighbor->aff_list); 399 } else { 400 list_add_tail(&ctx->aff_list, &neighbor->aff_list); 401 if (neighbor->aff_head) { 402 neighbor->aff_head = 0; 403 ctx->aff_head = 1; 404 } 405 } 406 407 if (!ctx->gang->aff_ref_ctx) 408 ctx->gang->aff_ref_ctx = ctx; 409 } 410 } 411 412 static int 413 spufs_create_context(struct inode *inode, struct dentry *dentry, 414 struct vfsmount *mnt, int flags, int mode, 415 struct file *aff_filp) 416 { 417 int ret; 418 int affinity; 419 struct spu_gang *gang; 420 struct spu_context *neighbor; 421 422 ret = -EPERM; 423 if ((flags & SPU_CREATE_NOSCHED) && 424 !capable(CAP_SYS_NICE)) 425 goto out_unlock; 426 427 ret = -EINVAL; 428 if ((flags & (SPU_CREATE_NOSCHED | SPU_CREATE_ISOLATE)) 429 == SPU_CREATE_ISOLATE) 430 goto out_unlock; 431 432 ret = -ENODEV; 433 if ((flags & SPU_CREATE_ISOLATE) && !isolated_loader) 434 goto out_unlock; 435 436 gang = NULL; 437 neighbor = NULL; 438 affinity = flags & (SPU_CREATE_AFFINITY_MEM | SPU_CREATE_AFFINITY_SPU); 439 if (affinity) { 440 gang = SPUFS_I(inode)->i_gang; 441 ret = -EINVAL; 442 if (!gang) 443 goto out_unlock; 444 mutex_lock(&gang->aff_mutex); 445 neighbor = spufs_assert_affinity(flags, gang, aff_filp); 446 if (IS_ERR(neighbor)) { 447 ret = PTR_ERR(neighbor); 448 goto out_aff_unlock; 449 } 450 } 451 452 ret = spufs_mkdir(inode, dentry, flags, mode & S_IRWXUGO); 453 if (ret) 454 goto out_aff_unlock; 455 456 if (affinity) 457 spufs_set_affinity(flags, SPUFS_I(dentry->d_inode)->i_ctx, 458 neighbor); 459 460 /* 461 * get references for dget and mntget, will be released 462 * in error path of *_open(). 463 */ 464 ret = spufs_context_open(dget(dentry), mntget(mnt)); 465 if (ret < 0) { 466 WARN_ON(spufs_rmdir(inode, dentry)); 467 mutex_unlock(&inode->i_mutex); 468 spu_forget(SPUFS_I(dentry->d_inode)->i_ctx); 469 goto out; 470 } 471 472 out_aff_unlock: 473 if (affinity) 474 mutex_unlock(&gang->aff_mutex); 475 out_unlock: 476 mutex_unlock(&inode->i_mutex); 477 out: 478 dput(dentry); 479 return ret; 480 } 481 482 static int 483 spufs_mkgang(struct inode *dir, struct dentry *dentry, int mode) 484 { 485 int ret; 486 struct inode *inode; 487 struct spu_gang *gang; 488 489 ret = -ENOSPC; 490 inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR); 491 if (!inode) 492 goto out; 493 494 ret = 0; 495 if (dir->i_mode & S_ISGID) { 496 inode->i_gid = dir->i_gid; 497 inode->i_mode &= S_ISGID; 498 } 499 gang = alloc_spu_gang(); 500 SPUFS_I(inode)->i_ctx = NULL; 501 SPUFS_I(inode)->i_gang = gang; 502 if (!gang) 503 goto out_iput; 504 505 inode->i_op = &simple_dir_inode_operations; 506 inode->i_fop = &simple_dir_operations; 507 508 d_instantiate(dentry, inode); 509 dir->i_nlink++; 510 dentry->d_inode->i_nlink++; 511 return ret; 512 513 out_iput: 514 iput(inode); 515 out: 516 return ret; 517 } 518 519 static int spufs_gang_open(struct dentry *dentry, struct vfsmount *mnt) 520 { 521 int ret; 522 struct file *filp; 523 524 ret = get_unused_fd(); 525 if (ret < 0) { 526 dput(dentry); 527 mntput(mnt); 528 goto out; 529 } 530 531 filp = dentry_open(dentry, mnt, O_RDONLY); 532 if (IS_ERR(filp)) { 533 put_unused_fd(ret); 534 ret = PTR_ERR(filp); 535 goto out; 536 } 537 538 filp->f_op = &simple_dir_operations; 539 fd_install(ret, filp); 540 out: 541 return ret; 542 } 543 544 static int spufs_create_gang(struct inode *inode, 545 struct dentry *dentry, 546 struct vfsmount *mnt, int mode) 547 { 548 int ret; 549 550 ret = spufs_mkgang(inode, dentry, mode & S_IRWXUGO); 551 if (ret) 552 goto out; 553 554 /* 555 * get references for dget and mntget, will be released 556 * in error path of *_open(). 557 */ 558 ret = spufs_gang_open(dget(dentry), mntget(mnt)); 559 if (ret < 0) { 560 int err = simple_rmdir(inode, dentry); 561 WARN_ON(err); 562 } 563 564 out: 565 mutex_unlock(&inode->i_mutex); 566 dput(dentry); 567 return ret; 568 } 569 570 571 static struct file_system_type spufs_type; 572 573 long spufs_create(struct nameidata *nd, unsigned int flags, mode_t mode, 574 struct file *filp) 575 { 576 struct dentry *dentry; 577 int ret; 578 579 ret = -EINVAL; 580 /* check if we are on spufs */ 581 if (nd->dentry->d_sb->s_type != &spufs_type) 582 goto out; 583 584 /* don't accept undefined flags */ 585 if (flags & (~SPU_CREATE_FLAG_ALL)) 586 goto out; 587 588 /* only threads can be underneath a gang */ 589 if (nd->dentry != nd->dentry->d_sb->s_root) { 590 if ((flags & SPU_CREATE_GANG) || 591 !SPUFS_I(nd->dentry->d_inode)->i_gang) 592 goto out; 593 } 594 595 dentry = lookup_create(nd, 1); 596 ret = PTR_ERR(dentry); 597 if (IS_ERR(dentry)) 598 goto out_dir; 599 600 ret = -EEXIST; 601 if (dentry->d_inode) 602 goto out_dput; 603 604 mode &= ~current->fs->umask; 605 606 if (flags & SPU_CREATE_GANG) 607 return spufs_create_gang(nd->dentry->d_inode, 608 dentry, nd->mnt, mode); 609 else 610 return spufs_create_context(nd->dentry->d_inode, 611 dentry, nd->mnt, flags, mode, filp); 612 613 out_dput: 614 dput(dentry); 615 out_dir: 616 mutex_unlock(&nd->dentry->d_inode->i_mutex); 617 out: 618 return ret; 619 } 620 621 /* File system initialization */ 622 enum { 623 Opt_uid, Opt_gid, Opt_mode, Opt_err, 624 }; 625 626 static match_table_t spufs_tokens = { 627 { Opt_uid, "uid=%d" }, 628 { Opt_gid, "gid=%d" }, 629 { Opt_mode, "mode=%o" }, 630 { Opt_err, NULL }, 631 }; 632 633 static int 634 spufs_parse_options(char *options, struct inode *root) 635 { 636 char *p; 637 substring_t args[MAX_OPT_ARGS]; 638 639 while ((p = strsep(&options, ",")) != NULL) { 640 int token, option; 641 642 if (!*p) 643 continue; 644 645 token = match_token(p, spufs_tokens, args); 646 switch (token) { 647 case Opt_uid: 648 if (match_int(&args[0], &option)) 649 return 0; 650 root->i_uid = option; 651 break; 652 case Opt_gid: 653 if (match_int(&args[0], &option)) 654 return 0; 655 root->i_gid = option; 656 break; 657 case Opt_mode: 658 if (match_octal(&args[0], &option)) 659 return 0; 660 root->i_mode = option | S_IFDIR; 661 break; 662 default: 663 return 0; 664 } 665 } 666 return 1; 667 } 668 669 static void spufs_exit_isolated_loader(void) 670 { 671 free_pages((unsigned long) isolated_loader, 672 get_order(isolated_loader_size)); 673 } 674 675 static void 676 spufs_init_isolated_loader(void) 677 { 678 struct device_node *dn; 679 const char *loader; 680 int size; 681 682 dn = of_find_node_by_path("/spu-isolation"); 683 if (!dn) 684 return; 685 686 loader = of_get_property(dn, "loader", &size); 687 if (!loader) 688 return; 689 690 /* the loader must be align on a 16 byte boundary */ 691 isolated_loader = (char *)__get_free_pages(GFP_KERNEL, get_order(size)); 692 if (!isolated_loader) 693 return; 694 695 isolated_loader_size = size; 696 memcpy(isolated_loader, loader, size); 697 printk(KERN_INFO "spufs: SPU isolation mode enabled\n"); 698 } 699 700 static int 701 spufs_create_root(struct super_block *sb, void *data) 702 { 703 struct inode *inode; 704 int ret; 705 706 ret = -ENODEV; 707 if (!spu_management_ops) 708 goto out; 709 710 ret = -ENOMEM; 711 inode = spufs_new_inode(sb, S_IFDIR | 0775); 712 if (!inode) 713 goto out; 714 715 inode->i_op = &simple_dir_inode_operations; 716 inode->i_fop = &simple_dir_operations; 717 SPUFS_I(inode)->i_ctx = NULL; 718 719 ret = -EINVAL; 720 if (!spufs_parse_options(data, inode)) 721 goto out_iput; 722 723 ret = -ENOMEM; 724 sb->s_root = d_alloc_root(inode); 725 if (!sb->s_root) 726 goto out_iput; 727 728 return 0; 729 out_iput: 730 iput(inode); 731 out: 732 return ret; 733 } 734 735 static int 736 spufs_fill_super(struct super_block *sb, void *data, int silent) 737 { 738 static struct super_operations s_ops = { 739 .alloc_inode = spufs_alloc_inode, 740 .destroy_inode = spufs_destroy_inode, 741 .statfs = simple_statfs, 742 .delete_inode = spufs_delete_inode, 743 .drop_inode = generic_delete_inode, 744 }; 745 746 sb->s_maxbytes = MAX_LFS_FILESIZE; 747 sb->s_blocksize = PAGE_CACHE_SIZE; 748 sb->s_blocksize_bits = PAGE_CACHE_SHIFT; 749 sb->s_magic = SPUFS_MAGIC; 750 sb->s_op = &s_ops; 751 752 return spufs_create_root(sb, data); 753 } 754 755 static int 756 spufs_get_sb(struct file_system_type *fstype, int flags, 757 const char *name, void *data, struct vfsmount *mnt) 758 { 759 return get_sb_single(fstype, flags, data, spufs_fill_super, mnt); 760 } 761 762 static struct file_system_type spufs_type = { 763 .owner = THIS_MODULE, 764 .name = "spufs", 765 .get_sb = spufs_get_sb, 766 .kill_sb = kill_litter_super, 767 }; 768 769 static int __init spufs_init(void) 770 { 771 int ret; 772 773 ret = -ENODEV; 774 if (!spu_management_ops) 775 goto out; 776 777 ret = -ENOMEM; 778 spufs_inode_cache = kmem_cache_create("spufs_inode_cache", 779 sizeof(struct spufs_inode_info), 0, 780 SLAB_HWCACHE_ALIGN, spufs_init_once); 781 782 if (!spufs_inode_cache) 783 goto out; 784 ret = spu_sched_init(); 785 if (ret) 786 goto out_cache; 787 ret = register_filesystem(&spufs_type); 788 if (ret) 789 goto out_sched; 790 ret = register_spu_syscalls(&spufs_calls); 791 if (ret) 792 goto out_fs; 793 794 spufs_init_isolated_loader(); 795 796 return 0; 797 798 out_fs: 799 unregister_filesystem(&spufs_type); 800 out_sched: 801 spu_sched_exit(); 802 out_cache: 803 kmem_cache_destroy(spufs_inode_cache); 804 out: 805 return ret; 806 } 807 module_init(spufs_init); 808 809 static void __exit spufs_exit(void) 810 { 811 spu_sched_exit(); 812 spufs_exit_isolated_loader(); 813 unregister_spu_syscalls(&spufs_calls); 814 unregister_filesystem(&spufs_type); 815 kmem_cache_destroy(spufs_inode_cache); 816 } 817 module_exit(spufs_exit); 818 819 MODULE_LICENSE("GPL"); 820 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>"); 821 822