Commit fbd7ec02 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin

powerpc: reuse asm-generic/barrier.h

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: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 53a05ac1
...@@ -34,8 +34,6 @@ ...@@ -34,8 +34,6 @@
#define rmb() __asm__ __volatile__ ("sync" : : : "memory") #define rmb() __asm__ __volatile__ ("sync" : : : "memory")
#define wmb() __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 #ifdef __SUBARCH_HAS_LWSYNC
# define SMPWMB LWSYNC # define SMPWMB LWSYNC
#else #else
...@@ -60,9 +58,6 @@ ...@@ -60,9 +58,6 @@
#define smp_wmb() barrier() #define smp_wmb() barrier()
#endif /* CONFIG_SMP */ #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 * This is a barrier which prevents following instructions from being
* started until the value of the argument x is known. For example, if * started until the value of the argument x is known. For example, if
...@@ -87,8 +82,8 @@ do { \ ...@@ -87,8 +82,8 @@ do { \
___p1; \ ___p1; \
}) })
#define smp_mb__before_atomic() smp_mb()
#define smp_mb__after_atomic() smp_mb()
#define smp_mb__before_spinlock() smp_mb() #define smp_mb__before_spinlock() smp_mb()
#include <asm-generic/barrier.h>
#endif /* _ASM_POWERPC_BARRIER_H */ #endif /* _ASM_POWERPC_BARRIER_H */
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