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s390: reuse asm-generic/barrier.h

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On s390 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 fbd7ec0236
commit 21535aaed9
1 changed files with 2 additions and 8 deletions
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10
arch/s390/include/asm/barrier.h
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@ -30,14 +30,6 @@
#define smp_rmb() rmb()
#define smp_wmb() wmb()
#define read_barrier_depends() do { } while (0)
#define smp_read_barrier_depends() do { } while (0)
#define smp_mb__before_atomic() smp_mb()
#define smp_mb__after_atomic() smp_mb()
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
@ -53,4 +45,6 @@ do { \
___p1; \
})
#include <asm-generic/barrier.h>
#endif /* __ASM_BARRIER_H */