loop: remove redundant __GFP_NOWARN flag

GFP_NOWAIT already includes __GFP_NOWARN, so let's remove the
redundant __GFP_NOWARN.

Signed-off-by: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: pedrodemargomes

drivers/block/loop.c

@@ -824,7 +824,7 @@ static void loop_queue_work(struct loop_device *lo, struct loop_cmd *cmd)
 	if (worker)
 		goto queue_work;
 
-	worker = kzalloc(sizeof(struct loop_worker), GFP_NOWAIT | __GFP_NOWARN);
+	worker = kzalloc(sizeof(struct loop_worker), GFP_NOWAIT);
 	/*
 	 * In the event we cannot allocate a worker, just queue on the
 	 * rootcg worker and issue the I/O as the rootcg