remove dead bdi congestion leftovers

From: Christoph Hellwig
Date: Wed Jul 01 2020 - 05:06:32 EST


Hi Jens,

we have a lot of bdi congestion related code that is left around without
any use. This series removes it in preparation of sorting out the bdi
lifetime rules properly.

Diffstat:
block/blk-cgroup.c | 19 ----
drivers/block/drbd/drbd_main.c | 59 --------------
drivers/block/drbd/drbd_proc.c | 1
drivers/md/bcache/request.c | 43 ----------
drivers/md/bcache/super.c | 1
drivers/md/dm-cache-target.c | 19 ----
drivers/md/dm-clone-target.c | 15 ---
drivers/md/dm-era-target.c | 15 ---
drivers/md/dm-raid.c | 12 --
drivers/md/dm-table.c | 37 ---------
drivers/md/dm-thin.c | 16 ---
drivers/md/dm.c | 33 --------
drivers/md/dm.h | 1
drivers/md/md-linear.c | 24 -----
drivers/md/md-multipath.c | 23 -----
drivers/md/md.c | 23 -----
drivers/md/md.h | 4
drivers/md/raid0.c | 16 ---
drivers/md/raid1.c | 31 -------
drivers/md/raid10.c | 26 ------
drivers/md/raid5.c | 25 ------
fs/btrfs/disk-io.c | 23 -----
include/linux/backing-dev-defs.h | 43 ----------
include/linux/backing-dev.h | 22 -----
include/linux/blk-cgroup.h | 6 -
include/linux/device-mapper.h | 11 --
mm/backing-dev.c | 157 +++------------------------------------
27 files changed, 20 insertions(+), 685 deletions(-)