block: remove per-queue plugging

Code has been converted over to the new explicit on-stack plugging,
and delay users have been converted to use the new API for that.
So lets kill off the old plugging along with aops->sync_page().

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

1 files changed, 0 insertions, 31 deletions

diff --git a/drivers/md/multipath.c b/drivers/md/multipath.c
index 6d7ddf32ef2e..1cc8ed44e4ad 100644
--- a/drivers/md/multipath.c
+++ b/drivers/md/multipath.c
@@ -106,36 +106,6 @@ static void multipath_end_request(struct bio *bio, int error)
         rdev_dec_pending(rdev, conf->mddev);
 }
 
-static void unplug_slaves(mddev_t *mddev)
-{
-        multipath_conf_t *conf = mddev->private;
-        int i;
-
-        rcu_read_lock();
-        for (i=0; i<mddev->raid_disks; i++) {
-                mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
-                if (rdev && !test_bit(Faulty, &rdev->flags)
-                    && atomic_read(&rdev->nr_pending)) {
-                        struct request_queue *r_queue = bdev_get_queue(rdev->bdev);
-
-                        atomic_inc(&rdev->nr_pending);
-                        rcu_read_unlock();
-
-                        blk_unplug(r_queue);
-
-                        rdev_dec_pending(rdev, mddev);
-                        rcu_read_lock();
-                }
-        }
-        rcu_read_unlock();
-}
-
-static void multipath_unplug(struct request_queue *q)
-{
-        unplug_slaves(q->queuedata);
-}
-
-
 static int multipath_make_request(mddev_t *mddev, struct bio * bio)
 {
         multipath_conf_t *conf = mddev->private;
@@ -518,7 +488,6 @@ static int multipath_run (mddev_t *mddev)
          */
         md_set_array_sectors(mddev, multipath_size(mddev, 0, 0));
 
-        mddev->queue->unplug_fn = multipath_unplug;
         mddev->queue->backing_dev_info.congested_fn = multipath_congested;
         mddev->queue->backing_dev_info.congested_data = mddev;
         md_integrity_register(mddev);