[PATCH] s390: Add missing memory constraint to stcrw()

Add missing memory constraint to stcrw() inline assembly.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 8 deletions

diff --git a/drivers/s390/s390mach.h b/drivers/s390/s390mach.h
index d9ea7ed2e46e..7abb42a09ae2 100644
--- a/drivers/s390/s390mach.h
+++ b/drivers/s390/s390mach.h
@@ -90,15 +90,16 @@ struct crw {
 
 static inline int stcrw(struct crw *pcrw )
 {
-        int ccode;
+        int ccode;
 
-        __asm__ __volatile__(
-                "STCRW 0(%1)\n\t"
-                "IPM %0\n\t"
-                "SRL %0,28\n\t"
-                : "=d" (ccode) : "a" (pcrw)
-                : "cc", "1" );
-        return ccode;
+        __asm__ __volatile__(
+                "stcrw 0(%2)\n\t"
+                "ipm %0\n\t"
+                "srl %0,28\n\t"
+                : "=d" (ccode), "=m" (*pcrw)
+                : "a" (pcrw)
+                : "cc" );
+        return ccode;
 }
 
 #endif /* __s390mach */