diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2015-04-27 23:48:34 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-08-13 12:31:57 -0600 |
| commit | 8ae126660fddbeebb9251a174e6fa45b6ad8f932 (patch) | |
| tree | fe471f94c8686b59f7a07b5b4f59ee4f51254902 /drivers/md/raid5.c | |
| parent | 7140aafce2fc14c5af02fdb7859b6bea0108be3d (diff) | |
| download | linux-8ae126660fddbeebb9251a174e6fa45b6ad8f932.tar.bz2 | |
block: kill merge_bvec_fn() completely
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>
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 32 |
1 files changed, 0 insertions, 32 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 7823295332de..6d20692952d2 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -4663,35 +4663,6 @@ static int raid5_congested(struct mddev *mddev, int bits) return 0; } -/* We want read requests to align with chunks where possible, - * but write requests don't need to. - */ -static int raid5_mergeable_bvec(struct mddev *mddev, - struct bvec_merge_data *bvm, - struct bio_vec *biovec) -{ - sector_t sector = bvm->bi_sector + get_start_sect(bvm->bi_bdev); - int max; - unsigned int chunk_sectors = mddev->chunk_sectors; - unsigned int bio_sectors = bvm->bi_size >> 9; - - /* - * always allow writes to be mergeable, read as well if array - * is degraded as we'll go through stripe cache anyway. - */ - if ((bvm->bi_rw & 1) == WRITE || mddev->degraded) - return biovec->bv_len; - - if (mddev->new_chunk_sectors < mddev->chunk_sectors) - chunk_sectors = mddev->new_chunk_sectors; - max = (chunk_sectors - ((sector & (chunk_sectors - 1)) + bio_sectors)) << 9; - if (max < 0) max = 0; - if (max <= biovec->bv_len && bio_sectors == 0) - return biovec->bv_len; - else - return max; -} - static int in_chunk_boundary(struct mddev *mddev, struct bio *bio) { sector_t sector = bio->bi_iter.bi_sector + get_start_sect(bio->bi_bdev); @@ -7764,7 +7735,6 @@ static struct md_personality raid6_personality = .quiesce = raid5_quiesce, .takeover = raid6_takeover, .congested = raid5_congested, - .mergeable_bvec = raid5_mergeable_bvec, }; static struct md_personality raid5_personality = { @@ -7788,7 +7758,6 @@ static struct md_personality raid5_personality = .quiesce = raid5_quiesce, .takeover = raid5_takeover, .congested = raid5_congested, - .mergeable_bvec = raid5_mergeable_bvec, }; static struct md_personality raid4_personality = @@ -7813,7 +7782,6 @@ static struct md_personality raid4_personality = .quiesce = raid5_quiesce, .takeover = raid4_takeover, .congested = raid5_congested, - .mergeable_bvec = raid5_mergeable_bvec, }; static int __init raid5_init(void) |