Merge remote-tracking branch 'device-mapper/for-next'

diff --cc drivers/md/dm-cache-metadata.c
Simple merge

diff --cc drivers/md/dm-cache-policy-cleaner.c
Simple merge

diff --cc drivers/md/dm-exception-store.c
Simple merge

diff --cc drivers/md/dm-snap-persistent.c
Simple merge

diff --cc drivers/md/dm.c
Simple merge

diff --cc drivers/md/persistent-data/dm-btree-remove.c
Simple merge

diff --cc drivers/md/persistent-data/dm-btree.c
Simple merge