Messages in this thread Patch in this message | | | Date | Wed, 01 Feb 2006 18:02:40 +0900 | From | Akinobu Mita <> | Subject | [patch 16/44] 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> include/asm-generic/bitops/ext2-atomic.h | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+)
Index: 2.6-git/include/asm-generic/bitops/ext2-atomic.h =================================================================== --- /dev/null +++ 2.6-git/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_ */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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