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

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

arch/powerpc/include/asm/barrier.h

+2 −7
Original line number Diff line number Diff line
@@ -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 */