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x86/um: reuse asm-generic/barrier.h 

On x86/um CONFIG_SMP is never defined.  As a result, several macros
match the asm-generic variant 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: Richard Weinberger <richard@nod.at>
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 fa083e28f8
commit 577f183acc
1 changed files with 1 additions and 8 deletions
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9
arch/x86/um/asm/barrier.h
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@ -36,13 +36,6 @@
#endif /* CONFIG_X86_PPRO_FENCE */ #endif /* CONFIG_X86_PPRO_FENCE */
#define dma_wmb() barrier() #define dma_wmb() barrier()
#define smp_mb() barrier() #include <asm-generic/barrier.h>
#define smp_rmb() barrier()
#define smp_wmb() barrier()
#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); barrier(); } while (0)
#define read_barrier_depends() do { } while (0)
#define smp_read_barrier_depends() do { } while (0)
#endif #endif