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Diffstat (limited to 'arch/x86/include/asm/barrier.h')
-rw-r--r--arch/x86/include/asm/barrier.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/barrier.h b/arch/x86/include/asm/barrier.h
index fe1e7e3cc844..63bdc6b85219 100644
--- a/arch/x86/include/asm/barrier.h
+++ b/arch/x86/include/asm/barrier.h
@@ -79,6 +79,9 @@ do { \
#define __smp_mb__before_atomic() do { } while (0)
#define __smp_mb__after_atomic() do { } while (0)
+/* Writing to CR3 provides a full memory barrier in switch_mm(). */
+#define smp_mb__after_switch_mm() do { } while (0)
+
#include <asm-generic/barrier.h>
#endif /* _ASM_X86_BARRIER_H */