s390/uaccess: fix access_ok compile warnings

On s390 access_ok is a macro which discards all parameters and always returns 1. This can result in compile warnings which warn about unused variables like this: fs/read_write.c: In function 'rw_copy_check_uvector': fs/read_write.c:684:16: warning: unused variable 'buf' [-Wunused-variable] Fix this by adding a __range_ok() function which consumes all parameters but still always returns 1. Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
chrispat · May 30, 2012 · 491af99 · 491af99
1 parent 2e30db9
commit 491af99
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
@@ -50,10 +50,15 @@
 
 #define segment_eq(a,b) ((a).ar4 == (b).ar4)
 
-#define __access_ok(addr, size)	\
-({				\
-	__chk_user_ptr(addr);	\
-	1;			\
+static inline int __range_ok(unsigned long addr, unsigned long size)
+{
+	return 1;
+}
+
+#define __access_ok(addr, size)				\
+({							\
+	__chk_user_ptr(addr);				\
+	__range_ok((unsigned long)(addr), (size));	\
 })
 
 #define access_ok(type, addr, size) __access_ok(addr, size)