md/dm - remove remains of plug_fn callback.

Now that unplugging is done differently, the unplug_fn callback is
never called, so it can be completely discarded.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 5ef136c..e5d8904 100644 (file)
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -390,13 +390,6 @@ static int raid_is_congested(struct dm_target_callbacks *cb, int bits)
        return md_raid5_congested(&rs->md, bits);
 }
 
-static void raid_unplug(struct dm_target_callbacks *cb)
-{
-       struct raid_set *rs = container_of(cb, struct raid_set, callbacks);
-
-       md_raid5_kick_device(rs->md.private);
-}
-
 /*
  * Construct a RAID4/5/6 mapping:
  * Args:
@@ -487,7 +480,6 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
        }
 
        rs->callbacks.congested_fn = raid_is_congested;
-       rs->callbacks.unplug_fn = raid_unplug;
        dm_table_add_target_callbacks(ti->table, &rs->callbacks);
 
        return 0;

diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index e276883..32a4423 100644 (file)
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -197,7 +197,6 @@ struct dm_target {
 struct dm_target_callbacks {
        struct list_head list;
        int (*congested_fn) (struct dm_target_callbacks *, int);
-       void (*unplug_fn)(struct dm_target_callbacks *);
 };
 
 int dm_register_target(struct target_type *t);