Commit a76ff688 authored Apr 01, 2015 by Paul E. McKenney

powerpc: Fix smp_mb__before_spinlock()



Currently, smp_mb__before_spinlock() is defined to be smp_wmb()
in core code, but this is not sufficient on PowerPC.  This patch
therefore supplies an override for the generic definition to
strengthen smp_mb__before_spinlock() to smp_mb(), as is needed
on PowerPC.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: <linuxppc-dev@lists.ozlabs.org>

parent 5ce035fb

arch/powerpc/include/asm/barrier.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -89,5 +89,6 @@ do { \

		#define smp_mb__before_atomic() smp_mb()
		#define smp_mb__after_atomic() smp_mb()
		#define smp_mb__before_spinlock() smp_mb()

		#endif /* _ASM_POWERPC_BARRIER_H */