drivers/block/ll_rw_blk.c: make a function static

@@ -2314,9 +2314,9 @@
  *    Insert a fully prepared request at the back of the io scheduler queue
  *    for execution.  Don't wait for completion.
  */
-void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
-			   struct request *rq, int at_head,
-			   void (*done)(struct request *))
+static void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
+				  struct request *rq, int at_head,
+				  void (*done)(struct request *))
 {
 	int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;