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ARM: 6998/2: kernel: use proper memory barriers for bitops 

Improve scalability by avoiding costly and unnecessary L2 cache sync
in handling bitops.

Signed-off-by: Heechul Yun <hyun@nvidia.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Heechul Yun 2011-07-19 13:26:54 +01:00 committed by Russell King
parent 24daa15aab
commit 4cde7e0dca
1 changed files with 2 additions and 2 deletions
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4
arch/arm/include/asm/bitops.h
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@ -26,8 +26,8 @@
#include <linux/compiler.h>
#include <asm/system.h>
#define smp_mb__before_clear_bit() mb()
#define smp_mb__after_clear_bit() mb()
#define smp_mb__before_clear_bit() smp_mb()
#define smp_mb__after_clear_bit() smp_mb()
/*
* These functions are the basis of our bit ops.