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

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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>
This commit is contained in:
Will Deacon 2014-05-02 16:24:12 +01:00 committed by Catalin Marinas
parent 493e68747e
commit be6209a610
1 changed files with 2 additions and 2 deletions
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4
arch/arm64/include/asm/barrier.h
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@ -40,7 +40,7 @@
#define smp_store_release(p, v) \ #define smp_store_release(p, v) \
do { \ do { \
compiletime_assert_atomic_type(*p); \ compiletime_assert_atomic_type(*p); \
smp_mb(); \ barrier(); \
ACCESS_ONCE(*p) = (v); \ ACCESS_ONCE(*p) = (v); \
} while (0) } while (0)
@ -48,7 +48,7 @@ do { \
({ \ ({ \
typeof(*p) ___p1 = ACCESS_ONCE(*p); \ typeof(*p) ___p1 = ACCESS_ONCE(*p); \
compiletime_assert_atomic_type(*p); \ compiletime_assert_atomic_type(*p); \
smp_mb(); \ barrier(); \
___p1; \ ___p1; \
}) })