kernel-ark/include/asm-generic/bitops/ext2-atomic.h
Akinobu Mita 148817ba09 asm-generic: add another generic ext2 atomic bitops
The majority of architectures implement ext2 atomic bitops as
test_and_{set,clear}_bit() without spinlock.

This adds this type of generic implementation in ext2-atomic-setbit.h and
use it wherever possible.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Suggested-by: Andreas Dilger <adilger@dilger.ca>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-07-26 16:49:46 -07:00

27 lines
561 B
C

#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
/*
* Spinlock based version of ext2 atomic bitops
*/
#define ext2_set_bit_atomic(lock, nr, addr) \
({ \
int ret; \
spin_lock(lock); \
ret = __test_and_set_bit_le(nr, addr); \
spin_unlock(lock); \
ret; \
})
#define ext2_clear_bit_atomic(lock, nr, addr) \
({ \
int ret; \
spin_lock(lock); \
ret = __test_and_clear_bit_le(nr, addr); \
spin_unlock(lock); \
ret; \
})
#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ */