1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef _LINUX_COMPAT25_H
38 #define _LINUX_COMPAT25_H
42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
43 #error sorry, lustre requires at least linux kernel 2.6.9 or later
46 #include <libcfs/linux/portals_compat25.h>
48 #include <linux/lustre_patchless_compat.h>
50 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
53 unsigned int ia_attr_flags;
56 #define ll_iattr iattr
57 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
59 #ifndef HAVE_SET_FS_PWD
60 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
61 struct dentry *dentry)
63 struct dentry *old_pwd;
64 struct vfsmount *old_pwdmnt;
66 write_lock(&fs->lock);
68 old_pwdmnt = fs->pwdmnt;
69 fs->pwdmnt = mntget(mnt);
70 fs->pwd = dget(dentry);
71 write_unlock(&fs->lock);
79 #define ll_set_fs_pwd set_fs_pwd
80 #endif /* HAVE_SET_FS_PWD */
83 * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
84 * ATTR_* attributes (see bug 13828)
86 #define ATTR_BLOCKS (1 << 27)
88 #if HAVE_INODE_I_MUTEX
89 #define UNLOCK_INODE_MUTEX(inode) do {mutex_unlock(&(inode)->i_mutex); } while(0)
90 #define LOCK_INODE_MUTEX(inode) do {mutex_lock(&(inode)->i_mutex); } while(0)
91 #define TRYLOCK_INODE_MUTEX(inode) mutex_trylock(&(inode)->i_mutex)
93 #define UNLOCK_INODE_MUTEX(inode) do {up(&(inode)->i_sem); } while(0)
94 #define LOCK_INODE_MUTEX(inode) do {down(&(inode)->i_sem); } while(0)
95 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
96 #endif /* HAVE_INODE_I_MUTEX */
98 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
99 #define d_child d_u.d_child
100 #define d_rcu d_u.d_rcu
103 #ifdef HAVE_DQUOTOFF_MUTEX
104 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {mutex_unlock(&(dqopt)->dqonoff_mutex); } while(0)
105 #define LOCK_DQONOFF_MUTEX(dqopt) do {mutex_lock(&(dqopt)->dqonoff_mutex); } while(0)
107 #define UNLOCK_DQONOFF_MUTEX(dqopt) do {up(&(dqopt)->dqonoff_sem); } while(0)
108 #define LOCK_DQONOFF_MUTEX(dqopt) do {down(&(dqopt)->dqonoff_sem); } while(0)
109 #endif /* HAVE_DQUOTOFF_MUTEX */
111 #define current_ngroups current->group_info->ngroups
112 #define current_groups current->group_info->small_block
115 #define page_private(page) ((page)->private)
116 #define set_page_private(page, v) ((page)->private = (v))
123 #define lock_dentry(___dentry) spin_lock(&(___dentry)->d_lock)
124 #define unlock_dentry(___dentry) spin_unlock(&(___dentry)->d_lock)
126 #define ll_kernel_locked() kernel_locked()
129 * OBD need working random driver, thus all our
130 * initialization routines must be called after device
131 * driver initialization
135 #define module_init(a) late_initcall(a)
138 /* XXX our code should be using the 2.6 calls, not the other way around */
139 #define TryLockPage(page) TestSetPageLocked(page)
140 #define Page_Uptodate(page) PageUptodate(page)
141 #define ll_redirty_page(page) set_page_dirty(page)
143 #define KDEVT_INIT(val) (val)
145 #define LTIME_S(time) (time.tv_sec)
146 #define ll_path_lookup path_lookup
147 #define ll_permission(inode,mask,nd) permission(inode,mask,nd)
149 #define ll_pgcache_lock(mapping) spin_lock(&mapping->page_lock)
150 #define ll_pgcache_unlock(mapping) spin_unlock(&mapping->page_lock)
151 #define ll_call_writepage(inode, page) \
152 (inode)->i_mapping->a_ops->writepage(page, NULL)
153 #define ll_invalidate_inode_pages(inode) \
154 invalidate_inode_pages((inode)->i_mapping)
155 #define ll_truncate_complete_page(page) \
156 truncate_complete_page(page->mapping, page)
158 #define ll_vfs_create(a,b,c,d) vfs_create(a,b,c,d)
159 #define ll_dev_t dev_t
161 #define to_kdev_t(dev) (dev)
162 #define kdev_t_to_nr(dev) (dev)
163 #define val_to_kdev(dev) (dev)
164 #define ILOOKUP(sb, ino, test, data) ilookup5(sb, ino, test, data);
166 #include <linux/writeback.h>
168 static inline int cleanup_group_info(void)
170 struct group_info *ginfo;
172 ginfo = groups_alloc(0);
176 set_current_groups(ginfo);
177 put_group_info(ginfo);
182 #define __set_page_ll_data(page, llap) \
184 page_cache_get(page); \
185 SetPagePrivate(page); \
186 set_page_private(page, (unsigned long)llap); \
188 #define __clear_page_ll_data(page) \
190 ClearPagePrivate(page); \
191 set_page_private(page, 0); \
192 page_cache_release(page); \
197 #include <linux/proc_fs.h>
199 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
200 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
201 extern void __d_rehash(struct dentry *dentry, int lock);
204 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
205 #define d_move_locked(dentry, target) __d_move(dentry, target)
206 extern void __d_move(struct dentry *dentry, struct dentry *target);
209 #ifdef HAVE_CAN_SLEEP_ARG
210 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
211 flock_lock_file_wait(file, lock, can_sleep)
213 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
214 flock_lock_file_wait(file, lock)
217 #define CheckWriteback(page, cmd) \
218 ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
219 (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
221 #ifdef HAVE_PAGE_LIST
222 static inline int mapping_has_pages(struct address_space *mapping)
226 ll_pgcache_lock(mapping);
227 if (list_empty(&mapping->dirty_pages) &&
228 list_empty(&mapping->clean_pages) &&
229 list_empty(&mapping->locked_pages)) {
232 ll_pgcache_unlock(mapping);
237 static inline int mapping_has_pages(struct address_space *mapping)
239 return mapping->nrpages > 0;
243 #ifdef HAVE_KIOBUF_KIO_BLOCKS
244 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
246 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
249 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7))
250 #define ll_set_dflags(dentry, flags) do { dentry->d_vfs_flags |= flags; } while(0)
251 #define ll_vfs_symlink(dir, dentry, path, mode) vfs_symlink(dir, dentry, path)
253 #define ll_set_dflags(dentry, flags) do { \
254 spin_lock(&dentry->d_lock); \
255 dentry->d_flags |= flags; \
256 spin_unlock(&dentry->d_lock); \
258 #ifdef HAVE_SECURITY_PLUG
259 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
260 vfs_symlink(dir, dentry, mnt, path, mode)
262 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
263 vfs_symlink(dir, dentry, path, mode)
268 #define container_of(ptr, type, member) ({ \
269 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
270 (type *)( (char *)__mptr - offsetof(type,member) );})
273 #ifdef HAVE_I_ALLOC_SEM
274 #define UP_WRITE_I_ALLOC_SEM(i) do { up_write(&(i)->i_alloc_sem); } while (0)
275 #define DOWN_WRITE_I_ALLOC_SEM(i) do { down_write(&(i)->i_alloc_sem); } while(0)
276 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
278 #define UP_READ_I_ALLOC_SEM(i) do { up_read(&(i)->i_alloc_sem); } while (0)
279 #define DOWN_READ_I_ALLOC_SEM(i) do { down_read(&(i)->i_alloc_sem); } while (0)
280 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
282 #define UP_READ_I_ALLOC_SEM(i) do { } while (0)
283 #define DOWN_READ_I_ALLOC_SEM(i) do { } while (0)
284 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) do { } while (0)
286 #define UP_WRITE_I_ALLOC_SEM(i) do { } while (0)
287 #define DOWN_WRITE_I_ALLOC_SEM(i) do { } while (0)
288 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) do { } while (0)
291 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
292 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
295 #ifndef HAVE_FILEMAP_FDATAWRITE
296 #define filemap_fdatawrite(mapping) filemap_fdatasync(mapping)
299 #ifdef HAVE_VFS_KERN_MOUNT
302 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
304 struct file_system_type *type = get_fs_type(fstype);
305 struct vfsmount *mnt;
307 return ERR_PTR(-ENODEV);
308 mnt = vfs_kern_mount(type, flags, name, data);
309 module_put(type->owner);
313 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
316 #ifndef HAVE_GENERIC_FILE_READ
319 generic_file_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos)
321 struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
325 init_sync_kiocb(&kiocb, filp);
326 kiocb.ki_pos = *ppos;
329 ret = generic_file_aio_read(&kiocb, &iov, 1, kiocb.ki_pos);
330 *ppos = kiocb.ki_pos;
335 #ifndef HAVE_GENERIC_FILE_WRITE
338 generic_file_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos)
340 struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = len };
344 init_sync_kiocb(&kiocb, filp);
345 kiocb.ki_pos = *ppos;
348 ret = generic_file_aio_write(&kiocb, &iov, 1, kiocb.ki_pos);
349 *ppos = kiocb.ki_pos;
355 #ifdef HAVE_STATFS_DENTRY_PARAM
356 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
358 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
362 #ifndef HAVE_TASK_PPTR
363 #define p_pptr parent
366 #ifndef HAVE_SB_TIME_GRAN
367 #ifndef HAVE_S_TIME_GRAN
368 #error Need s_time_gran patch!
370 static inline u32 get_sb_time_gran(struct super_block *sb)
372 return sb->s_time_gran;
376 #ifdef HAVE_RW_TREE_LOCK
377 #define TREE_READ_LOCK_IRQ(mapping) read_lock_irq(&(mapping)->tree_lock)
378 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
380 #define TREE_READ_LOCK_IRQ(mapping) spin_lock_irq(&(mapping)->tree_lock)
381 #define TREE_READ_UNLOCK_IRQ(mapping) spin_unlock_irq(&(mapping)->tree_lock)
384 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
385 #define ll_unregister_blkdev(a,b) unregister_blkdev((a),(b))
388 int ll_unregister_blkdev(unsigned int dev, const char *name)
390 unregister_blkdev(dev, name);
395 #ifdef HAVE_INVALIDATE_BDEV_2ARG
396 #define ll_invalidate_bdev(a,b) invalidate_bdev((a),(b))
398 #define ll_invalidate_bdev(a,b) invalidate_bdev((a))
401 #ifdef HAVE_INODE_BLKSIZE
402 #define ll_inode_blksize(a) (a)->i_blksize
404 #define ll_inode_blksize(a) (1<<(a)->i_blkbits)
407 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
408 #define LL_RENAME_DOES_D_MOVE FS_RENAME_DOES_D_MOVE
410 #define LL_RENAME_DOES_D_MOVE FS_ODD_RENAME
413 /* add a lustre compatible layer for crypto API */
414 #include <linux/crypto.h>
415 #ifdef HAVE_ASYNC_BLOCK_CIPHER
416 #define ll_crypto_hash crypto_hash
417 #define ll_crypto_cipher crypto_blkcipher
418 #define ll_crypto_alloc_hash(name, type, mask) crypto_alloc_hash(name, type, mask)
419 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
420 #define ll_crypto_hash_init(desc) crypto_hash_init(desc)
421 #define ll_crypto_hash_update(desc, sl, bytes) crypto_hash_update(desc, sl, bytes)
422 #define ll_crypto_hash_final(desc, out) crypto_hash_final(desc, out)
423 #define ll_crypto_alloc_blkcipher(name, type, mask) \
424 crypto_alloc_blkcipher(name ,type, mask)
425 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
426 crypto_blkcipher_setkey(tfm, key, keylen)
427 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
428 crypto_blkcipher_set_iv(tfm, src, len)
429 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
430 crypto_blkcipher_get_iv(tfm, dst, len)
431 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
432 crypto_blkcipher_encrypt(desc, dst, src, bytes)
433 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
434 crypto_blkcipher_decrypt(desc, dst, src, bytes)
435 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
436 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
437 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
438 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
440 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
441 u8 *key, unsigned int *keylen,
442 struct scatterlist *sg,
443 unsigned int size, u8 *result)
445 struct hash_desc desc;
449 rv = crypto_hash_setkey(desc.tfm, key, *keylen);
451 CERROR("failed to hash setkey: %d\n", rv);
454 return crypto_hash_digest(&desc, sg, size, result);
457 unsigned int crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
459 return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
462 unsigned int crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
464 return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
467 #define ll_crypto_hash_blocksize(tfm) crypto_hash_blocksize(tfm)
468 #define ll_crypto_hash_digestsize(tfm) crypto_hash_digestsize(tfm)
469 #define ll_crypto_blkcipher_ivsize(tfm) crypto_blkcipher_ivsize(tfm)
470 #define ll_crypto_blkcipher_blocksize(tfm) crypto_blkcipher_blocksize(tfm)
471 #define ll_crypto_free_hash(tfm) crypto_free_hash(tfm)
472 #define ll_crypto_free_blkcipher(tfm) crypto_free_blkcipher(tfm)
473 #else /* HAVE_ASYNC_BLOCK_CIPHER */
474 #include <linux/scatterlist.h>
475 #define ll_crypto_hash crypto_tfm
476 #define ll_crypto_cipher crypto_tfm
478 struct ll_crypto_hash *tfm;
481 struct blkcipher_desc {
482 struct ll_crypto_cipher *tfm;
486 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
487 crypto_cipher_setkey(tfm, key, keylen)
488 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
489 crypto_cipher_set_iv(tfm, src, len)
490 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
491 crypto_cipher_get_iv(tfm, dst, len)
492 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
493 crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
494 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
495 crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
496 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
497 crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
498 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
499 crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
501 extern struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(
502 const char * algname, u32 type, u32 mask);
504 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
506 char buf[CRYPTO_MAX_ALG_NAME + 1];
507 const char *pan = alg;
509 if (strncmp("hmac(", alg, 5) == 0) {
510 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
512 memcpy(buf, alg+ 5, vp - alg- 5);
513 buf[vp - alg - 5] = 0x00;
517 return crypto_alloc_tfm(pan, 0);
519 static inline int ll_crypto_hash_init(struct hash_desc *desc)
521 crypto_digest_init(desc->tfm); return 0;
523 static inline int ll_crypto_hash_update(struct hash_desc *desc,
524 struct scatterlist *sg,
527 struct scatterlist *sl = sg;
530 * This way is very weakness. We must ensure that
531 * the sum of sg[0..i]->length isn't greater than nbytes.
532 * In the upstream kernel the crypto_hash_update() also
533 * via the nbytes computed the count of sg[...].
534 * The old style is more safely. but it gone.
536 for (count = 0; nbytes > 0; count ++, sl ++) {
537 nbytes -= sl->length;
539 crypto_digest_update(desc->tfm, sg, count); return 0;
541 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
543 crypto_digest_final(desc->tfm, out); return 0;
545 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
546 u8 *key, unsigned int *keylen,
547 struct scatterlist *sg,
551 struct scatterlist *sl = sg;
553 for (count = 0; nbytes > 0; count ++, sl ++) {
554 nbytes -= sl->length;
556 crypto_hmac(tfm, key, keylen, sg, count, out);
560 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
561 #define ll_crypto_blkcipher_blocksize(tfm) crypto_tfm_alg_blocksize(tfm)
562 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
563 #define ll_crypto_hash_digestsize(tfm) crypto_tfm_alg_digestsize(tfm)
564 #define ll_crypto_hash_blocksize(tfm) crypto_tfm_alg_blocksize(tfm)
565 #define ll_crypto_free_hash(tfm) crypto_free_tfm(tfm)
566 #define ll_crypto_free_blkcipher(tfm) crypto_free_tfm(tfm)
567 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
569 #ifdef HAVE_SECURITY_PLUG
570 #define ll_remove_suid(inode,mnt) remove_suid(inode,mnt)
571 #define ll_vfs_rmdir(dir,entry,mnt) vfs_rmdir(dir,entry,mnt)
572 #define ll_vfs_mkdir(inode,dir,mnt,mode) vfs_mkdir(inode,dir,mnt,mode)
573 #define ll_vfs_link(old,mnt,dir,new,mnt1) vfs_link(old,mnt,dir,new,mnt1)
574 #define ll_vfs_unlink(inode,entry,mnt) vfs_unlink(inode,entry,mnt)
575 #define ll_vfs_mknod(dir,entry,mnt,mode,dev) \
576 vfs_mknod(dir,entry,mnt,mode,dev)
577 #define ll_security_inode_unlink(dir,entry,mnt) \
578 security_inode_unlink(dir,entry,mnt)
579 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
580 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
582 #define ll_remove_suid(inode,mnt) remove_suid(inode)
583 #define ll_vfs_rmdir(dir,entry,mnt) vfs_rmdir(dir,entry)
584 #define ll_vfs_mkdir(inode,dir,mnt,mode) vfs_mkdir(inode,dir,mode)
585 #define ll_vfs_link(old,mnt,dir,new,mnt1) vfs_link(old,dir,new)
586 #define ll_vfs_unlink(inode,entry,mnt) vfs_unlink(inode,entry)
587 #define ll_vfs_mknod(dir,entry,mnt,mode,dev) vfs_mknod(dir,entry,mode,dev)
588 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
589 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
590 vfs_rename(old,old_dir,new,new_dir)
594 #ifdef CONFIG_PREEMPT
595 #define get_cpu() ({ preempt_disable(); smp_processor_id(); })
596 #define put_cpu() preempt_enable()
598 #define get_cpu() smp_processor_id()
601 #endif /* get_cpu & put_cpu */
603 #ifndef for_each_possible_cpu
604 #define for_each_possible_cpu(i) for_each_cpu(i)
608 #define cpu_to_node(cpu) 0
612 static inline int abs(int x)
614 return (x < 0) ? -x : x;
619 static inline long labs(long x)
621 return (x < 0) ? -x : x;
625 /* Using kernel fls(). Userspace will use one defined in user-bitops.h. */
630 #endif /* __KERNEL__ */
631 #endif /* _COMPAT25_H */