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[PATCH] bitops: generic ext2_{set,clear}_bit_atomic()

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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>
This commit is contained in:
Akinobu Mita 2006-03-26 01:39:16 -08:00 committed by Linus Torvalds
parent 930ae745f5
commit 765f34fe32
1 changed files with 22 additions and 0 deletions
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22
include/asm-generic/bitops/ext2-atomic.h Normal file
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#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_ */