ocfs2: use __attribute__ format

Use the "format" attribute on ocfs2_error() and ocfs2_abort() so that the
compiler will warn when we get calls to those functions wrong.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

fs/ocfs2/super.h

@@ -33,12 +33,16 @@ int ocfs2_publish_get_mount_state(struct ocfs2_super *osb,
 
 void __ocfs2_error(struct super_block *sb,
 		   const char *function,
-		   const char *fmt, ...);
+		   const char *fmt, ...)
+	__attribute__ ((format (printf, 3, 4)));
+
 #define ocfs2_error(sb, fmt, args...) __ocfs2_error(sb, __PRETTY_FUNCTION__, fmt, ##args)
 
 void __ocfs2_abort(struct super_block *sb,
 		   const char *function,
-		   const char *fmt, ...);
+		   const char *fmt, ...)
+	__attribute__ ((format (printf, 3, 4)));
+
 #define ocfs2_abort(sb, fmt, args...) __ocfs2_abort(sb, __PRETTY_FUNCTION__, fmt, ##args)
 
 #endif /* OCFS2_SUPER_H */