[COMMITTED PATCH] S390: Quash unused variable warning due to no-op THREAD_SET_POINTER_GUARD.

[Roland McGrath]

Build-tested for s390x-linux-gnu.  Committed as obvious enough.


Thanks,
Roland


	* sysdeps/s390/nptl/tls.h (THREAD_SET_POINTER_GUARD): Refer to the
	value so it's not diagnosed as unused.

--- a/sysdeps/s390/nptl/tls.h
+++ b/sysdeps/s390/nptl/tls.h
@@ -173,7 +173,7 @@ typedef struct
    use stack_guard as pointer_guard.  */
 #define THREAD_GET_POINTER_GUARD() \
   THREAD_GETMEM (THREAD_SELF, header.stack_guard)
-#define THREAD_SET_POINTER_GUARD(value)
+#define THREAD_SET_POINTER_GUARD(value)	((void) (value))
 #define THREAD_COPY_POINTER_GUARD(descr)
 
 /* Get and set the global scope generation counter in struct pthread.  */