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| author | Akinobu Mita <mita@miraclelinux.com> | 2006-03-26 13:39:16 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 20:57:11 +0400 |
| commit | 765f34fe324bdf0c0544b3404d25aaa511e3834b (patch) | |
| tree | 073161aa7c213b15e0d3be6d99a2649de3030e00 /include/asm-generic/bitops | |
| parent | 930ae745f50088279fdc06057a429f16495b53a2 (diff) | |
| download | linux-765f34fe324bdf0c0544b3404d25aaa511e3834b.tar.xz | |
[PATCH] bitops: generic ext2_{set,clear}_bit_atomic()
This patch introduces the C-language equivalents of the functions below:
int ext2_set_bit_atomic(int nr, volatile unsigned long *addr);
int ext2_clear_bit_atomic(int nr, volatile unsigned long *addr);
In include/asm-generic/bitops/ext2-atomic.h
This code largely copied from: include/asm-sparc/bitops.h
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic/bitops')
| -rw-r--r-- | include/asm-generic/bitops/ext2-atomic.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-generic/bitops/ext2-atomic.h b/include/asm-generic/bitops/ext2-atomic.h new file mode 100644 index 000000000000..ab1c875efb74 --- /dev/null +++ b/include/asm-generic/bitops/ext2-atomic.h @@ -0,0 +1,22 @@ +#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ +#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ + +#define ext2_set_bit_atomic(lock, nr, addr) \ + ({ \ + int ret; \ + spin_lock(lock); \ + ret = ext2_set_bit((nr), (unsigned long *)(addr)); \ + spin_unlock(lock); \ + ret; \ + }) + +#define ext2_clear_bit_atomic(lock, nr, addr) \ + ({ \ + int ret; \ + spin_lock(lock); \ + ret = ext2_clear_bit((nr), (unsigned long *)(addr)); \ + spin_unlock(lock); \ + ret; \ + }) + +#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ */ |