Commit 765f34fe authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
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[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: default avatarAkinobu Mita <mita@miraclelinux.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 930ae745

include/asm-generic/bitops/ext2-atomic.h

0 → 100644
+22 −0
Original line number Diff line number Diff line 
#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_ */