nbd: tell the block layer that it is not a rotational device

Then we can get rid of that manual elevator type fiddling.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 4 insertions, 6 deletions

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 0766ce6187a9..7bcc1d8bc967 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -722,7 +722,6 @@ static int __init nbd_init(void)
 
         for (i = 0; i < nbds_max; i++) {
                 struct gendisk *disk = alloc_disk(1 << part_shift);
-                struct elevator_queue *old_e;
                 if (!disk)
                         goto out;
                 nbd_dev[i].disk = disk;
@@ -736,11 +735,10 @@ static int __init nbd_init(void)
                         put_disk(disk);
                         goto out;
                 }
-                old_e = disk->queue->elevator;
-                if (elevator_init(disk->queue, "deadline") == 0 ||
-                        elevator_init(disk->queue, "noop") == 0) {
-                                elevator_exit(old_e);
-                }
+                /*
+                 * Tell the block layer that we are not a rotational device
+                 */
+                queue_flag_set_unlocked(QUEUE_FLAG_NONROT, disk->queue);
         }
 
         if (register_blkdev(NBD_MAJOR, "nbd")) {