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arm64: reuse asm-generic/barrier.h 

On arm64 nop, read_barrier_depends, smp_read_barrier_depends
smp_store_mb(), smp_mb__before_atomic and smp_mb__after_atomic match the
asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

This is in preparation to refactoring this code area.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Michael S. Tsirkin 2015-12-21 09:22:18 +02:00
parent 335390d609
commit 90ff6a17d0
1 changed files with 1 additions and 8 deletions
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9
arch/arm64/include/asm/barrier.h
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@ -91,14 +91,7 @@ do { \
__u.__val; \
})
#define read_barrier_depends() do { } while(0)
#define smp_read_barrier_depends() do { } while(0)
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
#define nop() asm volatile("nop");
#define smp_mb__before_atomic() smp_mb()
#define smp_mb__after_atomic() smp_mb()
#include <asm-generic/barrier.h>
#endif /* __ASSEMBLY__ */