Commit 4cde7e0d authored Jul 19, 2011 by Heechul Yun Committed by Russell King Jul 22, 2011

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>

parent 24daa15a

arch/arm/include/asm/bitops.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -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.