[PATCH] deadline IO scheduler dispatching fix

Patch from Nick Piggin <piggin@cyberone.com.au>

Closes a window in which we can get an invalid (already dispatched) request
in the next_drq cache.

This fixed an oops which was reported by Janet Morgan.

drivers/block/deadline-iosched.c

@@ -98,7 +98,7 @@ struct deadline_rq {
 	unsigned long expires;
 };
 
-static inline void deadline_move_to_dispatch(struct deadline_data *dd, struct deadline_rq *drq);
+static void deadline_move_request(struct deadline_data *dd, struct deadline_rq *drq);
 
 static kmem_cache_t *drq_pool;
 
@@ -205,7 +205,7 @@ deadline_add_drq_rb(struct deadline_data *dd, struct deadline_rq *drq)
 		return;
 	}
 
-	deadline_move_to_dispatch(dd, __alias);
+	deadline_move_request(dd, __alias);
 	goto retry;
 }