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x86: reuse asm-generic/barrier.h

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As on most architectures, on x86 read_barrier_depends and
smp_read_barrier_depends are empty.  Drop the local definitions and pull
the generic ones from asm-generic/barrier.h instead: they are identical.

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>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Michael S. Tsirkin 2015-12-21 09:22:18 +02:00
parent 577f183acc
commit 300b06d455
1 changed files with 2 additions and 3 deletions
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5
arch/x86/include/asm/barrier.h
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@ -43,9 +43,6 @@
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); barrier(); } while (0)
#endif /* SMP */
#define read_barrier_depends() do { } while (0)
#define smp_read_barrier_depends() do { } while (0)
#if defined(CONFIG_X86_PPRO_FENCE)
/*
@ -91,4 +88,6 @@ do { \
#define smp_mb__before_atomic() barrier()
#define smp_mb__after_atomic() barrier()
#include <asm-generic/barrier.h>
#endif /* _ASM_X86_BARRIER_H */