Commit 4a7ac12e authored Feb 06, 2014 by Will Deacon Committed by Catalin Marinas Feb 06, 2014

arm64: barriers: allow dsb macro to take option parameter



The dsb instruction takes an option specifying both the target access
types and shareability domain.

This patch allows such an option to be passed to the dsb macro,
resulting in potentially more efficient code. Currently the option is
ignored until all callers are updated (unlike ARM, the option is
mandated by the assembler).

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 530b099d

arch/arm64/include/asm/barrier.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -25,7 +25,7 @@
		#define wfi() asm volatile("wfi" : : : "memory")

		#define isb() asm volatile("isb" : : : "memory")
		#define dsb() asm volatile("dsb sy" : : : "memory")
		#define dsb(opt) asm volatile("dsb sy" : : : "memory")

		#define mb() dsb()
		#define rmb() asm volatile("dsb ld" : : : "memory")