On Sun, Jan 10, 2016 at 04:17:09PM +0200, Michael S. Tsirkin wrote:
> On powerpc 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@xxxxxxxxxx>
> Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
Looks sane to me.
Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> ---
> arch/powerpc/include/asm/barrier.h | 9 ++-------
> 1 file changed, 2 insertions(+), 7 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h
> index a7af5fb..980ad0c 100644
> --- a/arch/powerpc/include/asm/barrier.h
> +++ b/arch/powerpc/include/asm/barrier.h
> @@ -34,8 +34,6 @@
> #define rmb() __asm__ __volatile__ ("sync" : : : "memory")
> #define wmb() __asm__ __volatile__ ("sync" : : : "memory")
>
> -#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
> -
> #ifdef __SUBARCH_HAS_LWSYNC
> # define SMPWMB LWSYNC
> #else
> @@ -60,9 +58,6 @@
> #define smp_wmb() barrier()
> #endif /* CONFIG_SMP */
>
> -#define read_barrier_depends() do { } while (0)
> -#define smp_read_barrier_depends() do { } while (0)
> -
> /*
> * This is a barrier which prevents following instructions from being
> * started until the value of the argument x is known. For example, if
> @@ -87,8 +82,8 @@ do { \
> ___p1; \
> })
>
> -#define smp_mb__before_atomic() smp_mb()
> -#define smp_mb__after_atomic() smp_mb()
> #define smp_mb__before_spinlock() smp_mb()
>
> +#include <asm-generic/barrier.h>
> +
> #endif /* _ASM_POWERPC_BARRIER_H */
> --
> MST
>
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