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    Subject[PATCH v3 12/41] 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>
    ---
    arch/x86/um/asm/barrier.h | 9 +--------
    1 file changed, 1 insertion(+), 8 deletions(-)

    diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h
    index 755481f..174781a 100644
    --- a/arch/x86/um/asm/barrier.h
    +++ b/arch/x86/um/asm/barrier.h
    @@ -36,13 +36,6 @@
    #endif /* CONFIG_X86_PPRO_FENCE */
    #define dma_wmb() barrier()

    -#define smp_mb() barrier()
    -#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)
    +#include <asm-generic/barrier.h>

    #endif
    --
    MST
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