1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 7afb0e2f07f4..48febf07e828 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -328,13 +328,13 @@ static inline unsigned type in##bwl##_p(int port)			\
 static inline void outs##bwl(int port, const void *addr, unsigned long count) \
 {                                                                       \
         asm volatile("rep; outs" #bwl                                   \
-                     : "+S"(addr), "+c"(count) : "d"(port));            \
+                     : "+S"(addr), "+c"(count) : "d"(port) : "memory"); \
 }                                                                       \
                                                                         \
 static inline void ins##bwl(int port, void *addr, unsigned long count)  \
 {                                                                       \
         asm volatile("rep; ins" #bwl                                    \
-                     : "+D"(addr), "+c"(count) : "d"(port));            \
+                     : "+D"(addr), "+c"(count) : "d"(port) : "memory"); \
 }
 
 BUILDIO(b, b, char)