forked from Minki/linux
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: Michael S. Tsirkin <mst@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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@ -34,8 +34,6 @@
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#define rmb() __asm__ __volatile__ ("sync" : : : "memory")
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#define wmb() __asm__ __volatile__ ("sync" : : : "memory")
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#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); smp_mb(); } while (0)
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#ifdef __SUBARCH_HAS_LWSYNC
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# define SMPWMB LWSYNC
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#else
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@ -60,9 +58,6 @@
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#define smp_wmb() barrier()
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#endif /* CONFIG_SMP */
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#define read_barrier_depends() do { } while (0)
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#define smp_read_barrier_depends() do { } while (0)
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/*
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* This is a barrier which prevents following instructions from being
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* started until the value of the argument x is known. For example, if
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@ -87,8 +82,8 @@ do { \
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___p1; \
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})
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#define smp_mb__before_atomic() smp_mb()
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#define smp_mb__after_atomic() smp_mb()
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#define smp_mb__before_spinlock() smp_mb()
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#include <asm-generic/barrier.h>
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#endif /* _ASM_POWERPC_BARRIER_H */
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