lustre/include/linux/lustre_compat25.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef _LINUX_COMPAT25_H
  38 #define _LINUX_COMPAT25_H
  39
  40 #include <linux/fs_struct.h>
  41 #include <linux/namei.h>
  42 #include <libcfs/linux/portals_compat25.h>
  43
  44 #include <linux/lustre_patchless_compat.h>
  45
  46 #ifdef HAVE_FS_STRUCT_RWLOCK
  47 # define LOCK_FS_STRUCT(fs)     write_lock(&(fs)->lock)
  48 # define UNLOCK_FS_STRUCT(fs)   write_unlock(&(fs)->lock)
  49 #else
  50 # define LOCK_FS_STRUCT(fs)     spin_lock(&(fs)->lock)
  51 # define UNLOCK_FS_STRUCT(fs)   spin_unlock(&(fs)->lock)
  52 #endif
  53
  54 #ifdef HAVE_FS_STRUCT_USE_PATH
  55 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  56                                  struct dentry *dentry)
  57 {
  58         struct path path;
  59         struct path old_pwd;
  60
  61         path.mnt = mnt;
  62         path.dentry = dentry;
  63         LOCK_FS_STRUCT(fs);
  64         old_pwd = fs->pwd;
  65         path_get(&path);
  66         fs->pwd = path;
  67         UNLOCK_FS_STRUCT(fs);
  68
  69         if (old_pwd.dentry)
  70                 path_put(&old_pwd);
  71 }
  72
  73 #else
  74
  75 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  76                 struct dentry *dentry)
  77 {
  78         struct dentry *old_pwd;
  79         struct vfsmount *old_pwdmnt;
  80
  81         LOCK_FS_STRUCT(fs);
  82         old_pwd = fs->pwd;
  83         old_pwdmnt = fs->pwdmnt;
  84         fs->pwdmnt = mntget(mnt);
  85         fs->pwd = dget(dentry);
  86         UNLOCK_FS_STRUCT(fs);
  87
  88         if (old_pwd) {
  89                 dput(old_pwd);
  90                 mntput(old_pwdmnt);
  91         }
  92 }
  93 #endif
  94
  95 /*
  96  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
  97  * ATTR_* attributes (see bug 13828)
  98  */
  99 #define ATTR_BLOCKS    (1 << 27)
 100
 101 #define current_ngroups current_cred()->group_info->ngroups
 102 #define current_groups current_cred()->group_info->small_block
 103
 104 /*
 105  * OBD need working random driver, thus all our
 106  * initialization routines must be called after device
 107  * driver initialization
 108  */
 109 #ifndef MODULE
 110 #undef module_init
 111 #define module_init(a)     late_initcall(a)
 112 #endif
 113
 114 #define LTIME_S(time)                   (time.tv_sec)
 115
 116 #ifdef HAVE_GENERIC_PERMISSION_2ARGS
 117 # define ll_generic_permission(inode, mask, flags, check_acl) \
 118          generic_permission(inode, mask)
 119 #elif defined HAVE_GENERIC_PERMISSION_4ARGS
 120 # define ll_generic_permission(inode, mask, flags, check_acl) \
 121          generic_permission(inode, mask, flags, check_acl)
 122 #else
 123 # define ll_generic_permission(inode, mask, flags, check_acl) \
 124          generic_permission(inode, mask, check_acl)
 125 #endif
 126
 127 #ifdef HAVE_DENTRY_OPEN_USE_PATH
 128 #define ll_dentry_open(a,b,c)   dentry_open(a,b,c)
 129 #else
 130 /*
 131  * dentry_open handles its own reference counting since Linux v3.6
 132  * (commit 765927b2). Callers should free their own references.
 133  *
 134  * Prior versions expected the caller to increment the references.
 135  * The references are retained on success and freed on error.
 136  */
 137 static inline struct file *ll_dentry_open(struct path *path, int flags,
 138                                           const struct cred *cred)
 139 {
 140         mntget(path->mnt);
 141         dget(path->dentry);
 142         return dentry_open(path->dentry, path->mnt, flags, cred);
 143 }
 144 #endif
 145
 146 #ifdef HAVE_SECURITY_PLUG
 147 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 148                 vfs_symlink(dir, dentry, mnt, path, mode)
 149 #else
 150 #ifdef HAVE_4ARGS_VFS_SYMLINK
 151 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 152                 vfs_symlink(dir, dentry, path, mode)
 153 #else
 154 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 155                        vfs_symlink(dir, dentry, path)
 156 #endif
 157
 158 #endif
 159
 160 #if !defined(HAVE_FILE_LLSEEK_SIZE) || defined(HAVE_FILE_LLSEEK_SIZE_5ARGS)
 161 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
 162                 generic_file_llseek_size(file, offset, origin, maxbytes, eof);
 163 #else
 164 #define ll_generic_file_llseek_size(file, offset, origin, maxbytes, eof) \
 165                 generic_file_llseek_size(file, offset, origin, maxbytes);
 166 #endif
 167
 168 #ifdef HAVE_INODE_DIO_WAIT
 169 /* inode_dio_wait(i) use as-is for write lock */
 170 # define inode_dio_write_done(i)        do {} while (0) /* for write unlock */
 171 # define inode_dio_read(i)              atomic_inc(&(i)->i_dio_count)
 172 /* inode_dio_done(i) use as-is for read unlock */
 173 #else
 174 # define inode_dio_wait(i)              down_write(&(i)->i_alloc_sem)
 175 # define inode_dio_write_done(i)        up_write(&(i)->i_alloc_sem)
 176 # define inode_dio_read(i)              down_read(&(i)->i_alloc_sem)
 177 # define inode_dio_done(i)              up_read(&(i)->i_alloc_sem)
 178 #endif
 179
 180 #ifdef HAVE_RW_TREE_LOCK
 181 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 182 #define TREE_READ_UNLOCK_IRQ(mapping)   read_unlock_irq(&(mapping)->tree_lock)
 183 #else
 184 #define TREE_READ_LOCK_IRQ(mapping)     spin_lock_irq(&(mapping)->tree_lock)
 185 #define TREE_READ_UNLOCK_IRQ(mapping)   spin_unlock_irq(&(mapping)->tree_lock)
 186 #endif
 187
 188 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 189 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 190 #else
 191 static inline
 192 int ll_unregister_blkdev(unsigned int dev, const char *name)
 193 {
 194         unregister_blkdev(dev, name);
 195         return 0;
 196 }
 197 #endif
 198
 199 #ifndef FS_HAS_FIEMAP
 200 #define FS_HAS_FIEMAP                   (0)
 201 #endif
 202
 203 #ifndef HAVE_FS_RENAME_DOES_D_MOVE
 204 #define FS_RENAME_DOES_D_MOVE           FS_ODD_RENAME
 205 #endif
 206
 207 /* add a lustre compatible layer for crypto API */
 208 #include <linux/crypto.h>
 209 #define ll_crypto_hash          crypto_hash
 210 #define ll_crypto_cipher        crypto_blkcipher
 211 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 212 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 213 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 214 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 215 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 216 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 217                 crypto_blkcipher_setkey(tfm, key, keylen)
 218 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 219                 crypto_blkcipher_set_iv(tfm, src, len)
 220 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 221                 crypto_blkcipher_get_iv(tfm, dst, len)
 222 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 223                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 224 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 225                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 226 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 227                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 228 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 229                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 230
 231 static inline
 232 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char *name,
 233                                                    u32 type, u32 mask)
 234 {
 235         struct ll_crypto_cipher *rtn = crypto_alloc_blkcipher(name, type, mask);
 236
 237         return (rtn == NULL ? ERR_PTR(-ENOMEM) : rtn);
 238 }
 239
 240 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 241                                  u8 *key, unsigned int *keylen,
 242                                  struct scatterlist *sg,
 243                                  unsigned int size, u8 *result)
 244 {
 245         struct hash_desc desc;
 246         int              rv;
 247         desc.tfm   = tfm;
 248         desc.flags = 0;
 249         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 250         if (rv) {
 251                 CERROR("failed to hash setkey: %d\n", rv);
 252                 return rv;
 253         }
 254         return crypto_hash_digest(&desc, sg, size, result);
 255 }
 256 static inline
 257 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 258 {
 259         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 260 }
 261 static inline
 262 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 263 {
 264         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 265 }
 266
 267 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 268 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 269 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 270 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 271 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 272 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 273
 274 #ifdef HAVE_SECURITY_PLUG
 275 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 276 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 277 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 278 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 279 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 280                 vfs_mknod(dir,entry,mnt,mode,dev)
 281 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 282                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 283 #else
 284 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 285 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 286 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 287 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 288 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 289 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 290                 vfs_rename(old,old_dir,new,new_dir)
 291 #endif /* HAVE_SECURITY_PLUG */
 292
 293 #ifdef for_each_possible_cpu
 294 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 295 #elif defined(for_each_cpu)
 296 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 297 #endif
 298
 299 #ifdef HAVE_BIO_ENDIO_2ARG
 300 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 301 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 302 #else
 303 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 304 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 305 #endif
 306
 307 #ifdef HAVE_FS_STRUCT_USE_PATH
 308 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 309 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 310 #define cfs_path_put(nd)     path_put(&(nd)->path)
 311 #else
 312 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 313 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 314 #define cfs_path_put(nd)     path_release(nd)
 315 #endif
 316
 317 #ifndef HAVE_SIMPLE_SETATTR
 318 #define simple_setattr(dentry, ops) inode_setattr((dentry)->d_inode, ops)
 319 #endif
 320
 321 #ifndef SLAB_DESTROY_BY_RCU
 322 #define SLAB_DESTROY_BY_RCU 0
 323 #endif
 324
 325 static inline int
 326 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 327 {
 328         int rc;
 329
 330         if (sb->s_qcop->quota_on) {
 331 #ifdef HAVE_QUOTA_ON_USE_PATH
 332                 struct path path;
 333
 334                 rc = kern_path(name, LOOKUP_FOLLOW, &path);
 335                 if (!rc)
 336                         return rc;
 337 #endif
 338                 rc = sb->s_qcop->quota_on(sb, off, ver
 339 #ifdef HAVE_QUOTA_ON_USE_PATH
 340                                             , &path
 341 #else
 342                                             , name
 343 #endif
 344 #ifdef HAVE_QUOTA_ON_5ARGS
 345                                             , remount
 346 #endif
 347                                            );
 348 #ifdef HAVE_QUOTA_ON_USE_PATH
 349                 path_put(&path);
 350 #endif
 351                 return rc;
 352         }
 353         else
 354                 return -ENOSYS;
 355 }
 356
 357 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 358 {
 359         if (sb->s_qcop->quota_off) {
 360                 return sb->s_qcop->quota_off(sb, off
 361 #ifdef HAVE_QUOTA_OFF_3ARGS
 362                                              , remount
 363 #endif
 364                                             );
 365         }
 366         else
 367                 return -ENOSYS;
 368 }
 369
 370 #ifndef HAVE_DQUOT_SUSPEND
 371 # define ll_vfs_dq_init             vfs_dq_init
 372 # define ll_vfs_dq_drop             vfs_dq_drop
 373 # define ll_vfs_dq_transfer         vfs_dq_transfer
 374 # define ll_vfs_dq_off(sb, remount) vfs_dq_off(sb, remount)
 375 #else
 376 # define ll_vfs_dq_init             dquot_initialize
 377 # define ll_vfs_dq_drop             dquot_drop
 378 # define ll_vfs_dq_transfer         dquot_transfer
 379 # define ll_vfs_dq_off(sb, remount) dquot_suspend(sb, -1)
 380 #endif
 381
 382 #ifndef HAVE_BLKDEV_GET_BY_DEV
 383 # define blkdev_get_by_dev(dev, mode, holder) open_by_devnum(dev, mode)
 384 #endif
 385
 386 #ifndef HAVE_BLK_QUEUE_MAX_SEGMENTS
 387 #define blk_queue_max_segments(rq, seg)                      \
 388         do { blk_queue_max_phys_segments(rq, seg);           \
 389              blk_queue_max_hw_segments(rq, seg); } while (0)
 390 #else
 391 #define queue_max_phys_segments(rq)       queue_max_segments(rq)
 392 #define queue_max_hw_segments(rq)         queue_max_segments(rq)
 393 #endif
 394
 395 #ifdef HAVE_KMAP_ATOMIC_HAS_1ARG
 396 #define ll_kmap_atomic(a, b)    kmap_atomic(a)
 397 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a)
 398 #else
 399 #define ll_kmap_atomic(a, b)    kmap_atomic(a, b)
 400 #define ll_kunmap_atomic(a, b)  kunmap_atomic(a, b)
 401 #endif
 402
 403 #ifndef HAVE_CLEAR_INODE
 404 #define clear_inode(i)          end_writeback(i)
 405 #endif
 406
 407 #ifdef HAVE_DENTRY_D_ALIAS_HLIST
 408 #define ll_d_hlist_node hlist_node
 409 #define ll_d_hlist_empty(list) hlist_empty(list)
 410 #define ll_d_hlist_entry(ptr, type, name) hlist_entry(ptr.first, type, name)
 411 #define ll_d_hlist_for_each(tmp, i_dentry) hlist_for_each(tmp, i_dentry)
 412 #ifdef HAVE_HLIST_FOR_EACH_3ARG
 413 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 414         p = NULL; hlist_for_each_entry(dentry, i_dentry, alias)
 415 #else
 416 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 417         hlist_for_each_entry(dentry, p, i_dentry, alias)
 418 #endif
 419 #define DECLARE_LL_D_HLIST_NODE_PTR(name) struct ll_d_hlist_node *name
 420 #else
 421 #define ll_d_hlist_node list_head
 422 #define ll_d_hlist_empty(list) list_empty(list)
 423 #define ll_d_hlist_entry(ptr, type, name) list_entry(ptr.next, type, name)
 424 #define ll_d_hlist_for_each(tmp, i_dentry) list_for_each(tmp, i_dentry)
 425 #define ll_d_hlist_for_each_entry(dentry, p, i_dentry, alias) \
 426         list_for_each_entry(dentry, i_dentry, alias)
 427 #define DECLARE_LL_D_HLIST_NODE_PTR(name) /* nothing */
 428 #endif
 429
 430
 431 #ifndef HAVE_BI_HW_SEGMENTS
 432 #define bio_hw_segments(q, bio) 0
 433 #endif
 434
 435 #ifndef QUOTA_OK
 436 # define QUOTA_OK 0
 437 #endif
 438 #ifndef NO_QUOTA
 439 # define NO_QUOTA (-EDQUOT)
 440 #endif
 441
 442 #ifndef SEEK_DATA
 443 #define SEEK_DATA      3       /* seek to the next data */
 444 #endif
 445 #ifndef SEEK_HOLE
 446 #define SEEK_HOLE      4       /* seek to the next hole */
 447 #endif
 448
 449 #ifndef FMODE_UNSIGNED_OFFSET
 450 #define FMODE_UNSIGNED_OFFSET   ((__force fmode_t)0x2000)
 451 #endif
 452
 453 #if !defined(_ASM_GENERIC_BITOPS_EXT2_NON_ATOMIC_H_) && !defined(ext2_set_bit)
 454 # define ext2_set_bit             __test_and_set_bit_le
 455 # define ext2_clear_bit           __test_and_clear_bit_le
 456 # define ext2_test_bit            test_bit_le
 457 # define ext2_find_first_zero_bit find_first_zero_bit_le
 458 # define ext2_find_next_zero_bit  find_next_zero_bit_le
 459 #endif
 460
 461 #ifdef ATTR_TIMES_SET
 462 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)
 463 #else
 464 # define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET)
 465 #endif
 466
 467 #ifndef HAVE_LM_XXX_LOCK_MANAGER_OPS
 468 # define lm_compare_owner       fl_compare_owner
 469 #endif
 470
 471 /*
 472  * After 3.1, kernel's nameidata.intent.open.flags is different
 473  * with lustre's lookup_intent.it_flags, as lustre's it_flags'
 474  * lower bits equal to FMODE_xxx while kernel doesn't transliterate
 475  * lower bits of nameidata.intent.open.flags to FMODE_xxx.
 476  * */
 477 #include <linux/version.h>
 478 static inline int ll_namei_to_lookup_intent_flag(int flag)
 479 {
 480 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)
 481         flag = (flag & ~O_ACCMODE) | OPEN_FMODE(flag);
 482 #endif
 483         return flag;
 484 }
 485
 486 #ifdef HAVE_VOID_MAKE_REQUEST_FN
 487 # define ll_mrf_ret void
 488 # define LL_MRF_RETURN(rc)
 489 #else
 490 # define ll_mrf_ret int
 491 # define LL_MRF_RETURN(rc) RETURN(rc)
 492 #endif
 493
 494 #include <linux/fs.h>
 495 #ifndef HAVE_PROTECT_I_NLINK
 496 static inline void set_nlink(struct inode *inode, unsigned int nlink)
 497 {
 498         inode->i_nlink = nlink;
 499 }
 500 #endif
 501
 502 #ifdef HAVE_INODEOPS_USE_UMODE_T
 503 # define ll_umode_t     umode_t
 504 #else
 505 # define ll_umode_t     int
 506 #endif
 507
 508 #include <linux/dcache.h>
 509 #ifndef HAVE_D_MAKE_ROOT
 510 static inline struct dentry *d_make_root(struct inode *root)
 511 {
 512         struct dentry *res = d_alloc_root(root);
 513
 514         if (res == NULL && root)
 515                 iput(root);
 516
 517         return res;
 518 }
 519 #endif
 520
 521 #ifdef HAVE_DIRTY_INODE_HAS_FLAG
 522 # define ll_dirty_inode(inode, flag)    (inode)->i_sb->s_op->dirty_inode((inode), flag)
 523 #else
 524 # define ll_dirty_inode(inode, flag)    (inode)->i_sb->s_op->dirty_inode((inode))
 525 #endif
 526
 527 #endif /* _COMPAT25_H */