[Xen-changelog] [xen master] xen: arm: Use dmb for smp barriers

[patchbot@xxxxxxx]

commit 49632ebf69e4e24ae24d2a524e91b0cc5e8d5b0e
Author:     Ian Campbell <ian.campbell@xxxxxxxxxx>
AuthorDate: Mon Mar 17 14:53:27 2014 +0000
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Tue Mar 18 15:55:27 2014 +0000

    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
    clarity.
    
    Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
    Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
    Acked-by: Tim Deegan <tim@xxxxxxx>
---
 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))))
--
generated by git-patchbot for /home/xen/git/xen.git#master

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