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[Xen-devel] [PATCH 07/10] xen: arm: Use dmb for smp barriers

The full power of dsb is not required in this context.

Also change wmb() to be dsb() directly instead of indirectly via mb(), for

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
 xen/include/asm-arm/system.h |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
index e003624..89c61ef 100644
--- a/xen/include/asm-arm/system.h
+++ b/xen/include/asm-arm/system.h
@@ -18,11 +18,11 @@
 #define mb()            dsb()
 #define rmb()           dsb()
-#define wmb()           mb()
+#define wmb()           dsb()
-#define smp_mb()        mb()
-#define smp_rmb()       rmb()
-#define smp_wmb()       wmb()
+#define smp_mb()        dmb()
+#define smp_rmb()       dmb()
+#define smp_wmb()       dmb()
 #define xchg(ptr,x) \
         ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))

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