block: switch s390 tape_block and mg_disk to elevator_change()

Now that we have this API, switch the two in-kernel users to it.
Resolves an oops introduced by commit
1abec4fdbb142e3ccb6ce99832fae42129134a96.

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/s390/char/tape_block.c b/drivers/s390/char/tape_block.c
index b7de02525ec9..85cf607fc78f 100644
--- a/drivers/s390/char/tape_block.c
+++ b/drivers/s390/char/tape_block.c
@@ -217,8 +217,7 @@ tapeblock_setup_device(struct tape_device * device)
         if (!blkdat->request_queue)
                 return -ENOMEM;
 
-        elevator_exit(blkdat->request_queue->elevator);
-        rc = elevator_init(blkdat->request_queue, "noop");
+        rc = elevator_change(blkdat->request_queue, "noop");
         if (rc)
                 goto cleanup_queue;