target/tcm_loop: Use blk_queue_flag_set()

Use blk_queue_flag_set() instead of open-coding this function.

Cc: Nicholas A. Bellinger <nab@linux-iscsi.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/target/loopback/tcm_loop.c

@@ -309,7 +309,7 @@ static int tcm_loop_target_reset(struct scsi_cmnd *sc)
 
 static int tcm_loop_slave_alloc(struct scsi_device *sd)
 {
-	set_bit(QUEUE_FLAG_BIDI, &sd->request_queue->queue_flags);
+	blk_queue_flag_set(QUEUE_FLAG_BIDI, sd->request_queue);
 	return 0;
 }