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asm-generic: add another generic ext2 atomic bitops

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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>
This commit is contained in:
Akinobu Mita
2011-07-26 16:09:04 -07:00
committed by Linus Torvalds
parent b2c9cd3793
commit 148817ba09
15 changed files with 28 additions and 59 deletions
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11
include/asm-generic/bitops/ext2-atomic-setbit.h Normal file
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@@ -0,0 +1,11 @@
#ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
#define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_
/*
* Atomic bitops based version of ext2 atomic bitops
*/
#define ext2_set_bit_atomic(l, nr, addr) test_and_set_bit_le(nr, addr)
#define ext2_clear_bit_atomic(l, nr, addr) test_and_clear_bit_le(nr, addr)
#endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_SETBIT_H_ */

4
include/asm-generic/bitops/ext2-atomic.h
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@@ -1,6 +1,10 @@
#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; \