As per: lkml.kernel.org/r/20150921112252.3c2937e1@mschwide atomics imply a barrier on s390, so s390 should change smp_mb__before_atomic and smp_mb__after_atomic to barrier() instead of smp_mb() and hence should not use the generic versions.
Suggested-by: Peter Zijlstra <[email protected]> Suggested-by: Martin Schwidefsky <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> --- arch/s390/include/asm/barrier.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h index 4d26fa4..5c8db3c 100644 --- a/arch/s390/include/asm/barrier.h +++ b/arch/s390/include/asm/barrier.h @@ -45,6 +45,9 @@ do { \ ___p1; \ }) +#define __smp_mb__before_atomic() barrier() +#define __smp_mb__after_atomic() barrier() + #include <asm-generic/barrier.h> #endif /* __ASM_BARRIER_H */ -- MST _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
