[PATCH] s390 signal annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-s390/signal.h b/include/asm-s390/signal.h
index 3d6e11c..7084626 100644
--- a/include/asm-s390/signal.h
+++ b/include/asm-s390/signal.h
@@ -165,7 +165,7 @@
 #endif /* __KERNEL__ */
 
 typedef struct sigaltstack {
-        void *ss_sp;
+        void __user *ss_sp;
         int ss_flags;
         size_t ss_size;
 } stack_t;