Commit d152d22a authored Mar 10, 2014 by Will Deacon Committed by Catalin Marinas Mar 10, 2014

arm64: barriers: add dmb barrier



Commit 8adbf57f ("irqchip: gic: use dmb ishst instead of dsb when
raising a softirq") added an explicit dmb(...) call to the GIC driver.

This patch adds a simple dmb() macro to arm64, which expands to a DMB SY
instruction.

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

parent f6e763b9

arch/arm64/include/asm/barrier.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@
		#define wfi() asm volatile("wfi" : : : "memory")

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

		#define mb() dsb()