Commit be6209a6 authored May 02, 2014 by Will Deacon Committed by Catalin Marinas May 09, 2014

arm64: barriers: use barrier() instead of smp_mb() when !SMP



The recently introduced acquire/release accessors refer to smp_mb()
in the !CONFIG_SMP case. This is confusing when reading the code, so use
barrier() directly when we know we're UP.

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

parent 493e6874

arch/arm64/include/asm/barrier.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -40,7 +40,7 @@
		#define smp_store_release(p, v) \
		do { \
		compiletime_assert_atomic_type(*p); \
		smp_mb(); \
		barrier(); \
		ACCESS_ONCE(*p) = (v); \
		} while (0)

		@@ -48,7 +48,7 @@ do { \
		({ \
		typeof(p) ___p1 = ACCESS_ONCE(p); \
		compiletime_assert_atomic_type(*p); \
		smp_mb(); \
		barrier(); \
		___p1; \
		})