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authorWill Deacon <will.deacon@arm.com>2014-03-10 10:36:52 +0000
committerCatalin Marinas <catalin.marinas@arm.com>2014-03-10 11:57:40 +0000
commitd152d22a18c240286c19997a6249ee76ea055926 (patch)
tree8f2c88c264c7031e139c2016e7edd6e7bd1a2d0f /arch/arm64
parentf6e763b93a6cd3411fd8df925344022719bcba62 (diff)
downloadlinux-d152d22a18c240286c19997a6249ee76ea055926.tar.bz2
arm64: barriers: add dmb barrier
Commit 8adbf57fc429 ("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>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/include/asm/barrier.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 409ca370cfe2..66eb7648043b 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -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()