drbd: make intelligent use of blkdev_issue_zeroout
authorChristoph Hellwig <hch@lst.de>
Wed, 5 Apr 2017 17:21:21 +0000 (19:21 +0200)
committerJens Axboe <axboe@fb.com>
Sat, 8 Apr 2017 17:25:38 +0000 (11:25 -0600)
commit0dbed96a3cc9786bc4814dab98a7218753bde934
tree8f6f673be536243457eb8ba5ce4cc271be7a3b2c
parent71027e97d796d1e9b210a2f64bf2cc25e225a4c0
drbd: make intelligent use of blkdev_issue_zeroout

drbd always wants its discard wire operations to zero the blocks, so
use blkdev_issue_zeroout with the BLKDEV_ZERO_UNMAP flag instead of
reinventing it poorly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
drivers/block/drbd/drbd_debugfs.c
drivers/block/drbd/drbd_int.h
drivers/block/drbd/drbd_receiver.c
drivers/block/drbd/drbd_req.c