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-rw-r--r--i386/i386/xen.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/i386/i386/xen.h b/i386/i386/xen.h
index 5bdaf0b..638d671 100644
--- a/i386/i386/xen.h
+++ b/i386/i386/xen.h
@@ -33,7 +33,7 @@
/* TODO: this should be moved in appropriate non-Xen place. */
#define barrier() __asm__ __volatile__ ("": : :"memory")
-#define mb() __asm__ __volatile__("lock; addl $0,0(%esp)")
+#define mb() __asm__ __volatile__("lock; addl $0,0(%%esp)":::"memory")
#define rmb() mb()
#define wmb() mb()
MACH_INLINE unsigned long xchgl(volatile unsigned long *ptr, unsigned long x)