[XenPPC] [xenppc-unstable] cpu_relax() needs to call barrier()

[Xen patchbot-xenppc-unstable <patchbot-xenppc-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
# Node ID a8e67a19c3255a6bbc0aaa5c9e1736f1ddd76f6c
# Parent  cc45282daf3d242fdcf6e858c0b18b7f1086a318
cpu_relax() needs to call barrier()

Signed-off-by: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>
---
 xen/include/asm-powerpc/processor.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -r cc45282daf3d -r a8e67a19c325 xen/include/asm-powerpc/processor.h
--- a/xen/include/asm-powerpc/processor.h       Mon Nov 27 17:17:07 2006 -0500
+++ b/xen/include/asm-powerpc/processor.h       Tue Nov 28 10:33:53 2006 -0500
@@ -152,7 +152,8 @@ static inline void nop(void) {
 static inline void nop(void) {
     __asm__ __volatile__ ("nop");
 }
-#define cpu_relax() nop()
+/* will need to address thread priorities when we go SMT */
+#define cpu_relax() barrier()
 
 static inline unsigned int mfpir(void)
 {

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