dm io: discards don't take a payload
authorChristoph Hellwig <hch@lst.de>
Wed, 5 Apr 2017 17:21:04 +0000 (19:21 +0200)
committerJens Axboe <axboe@fb.com>
Sat, 8 Apr 2017 17:25:38 +0000 (11:25 -0600)
commit0f5d690f7bf1b1a5354c61ac5b9d69a4329e218f
treeaa5dc525cfa91d3758d8cabc5de2edcfc077af34
parent3deff1a70d5901342f460f8cc36e5d0c5d51c319
dm io: discards don't take a payload

Fix up do_region to not allocate a bio_vec for discards.  We've
got rid of the discard payload allocated by the caller years ago.

Obviously this wasn't actually harmful given how long it's been
there, but it's still good to avoid the pointless allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
drivers/md/dm-io.c