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block: kill merge_bvec_fn() completely

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As generic_make_request() is now able to handle arbitrarily sized bios,
it's no longer necessary for each individual block driver to define its
own ->merge_bvec_fn() callback. Remove every invocation completely.

Cc: Jens Axboe <axboe@kernel.dk>
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com>
Cc: drbd-user@lists.linbit.com
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Yehuda Sadeh <yehuda@inktank.com>
Cc: Sage Weil <sage@inktank.com>
Cc: Alex Elder <elder@kernel.org>
Cc: ceph-devel@vger.kernel.org
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: dm-devel@redhat.com
Cc: Neil Brown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Cc: Christoph Hellwig <hch@infradead.org>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Acked-by: NeilBrown <neilb@suse.de> (for the 'md' bits)
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
[dpark: also remove ->merge_bvec_fn() in dm-thin as well as
 dm-era-target, and resolve merge conflicts]
Signed-off-by: Dongsu Park <dpark@posteo.net>
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Kent Overstreet
2015-04-27 23:48:34 -07:00
committed by Jens Axboe
parent 7140aafce2
commit 8ae126660f
32 changed files with 9 additions and 859 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/md/dm-raid.c
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@@ -1717,24 +1717,6 @@ static void raid_resume(struct dm_target *ti)
mddev_resume(&rs->md);
}
static int raid_merge(struct dm_target *ti, struct bvec_merge_data *bvm,
struct bio_vec *biovec, int max_size)
{
struct raid_set *rs = ti->private;
struct md_personality *pers = rs->md.pers;
if (pers && pers->mergeable_bvec)
return min(max_size, pers->mergeable_bvec(&rs->md, bvm, biovec));
/*
* In case we can't request the personality because
* the raid set is not running yet
*
* -> return safe minimum
*/
return rs->md.chunk_sectors;
}
static struct target_type raid_target = {
.name = "raid",
.version = {1, 7, 0},
@@ -1749,7 +1731,6 @@ static struct target_type raid_target = {
.presuspend = raid_presuspend,
.postsuspend = raid_postsuspend,
.resume = raid_resume,
.merge = raid_merge,
};
static int __init dm_raid_init(void)