Commit 2feb96c4 authored Feb 06, 2014 by Will Deacon Committed by Ian Maund Apr 17, 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>
Git-commit: 4a7ac12eedd190cdf071e61145defa73df1675c0
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Ian Maund <imaund@codeaurora.org>

parent c9bd306f

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")