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| 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/linear.c | |
| parent | 7140aafce2fc14c5af02fdb7859b6bea0108be3d (diff) | |
| download | linux-8ae126660fddbeebb9251a174e6fa45b6ad8f932.tar.gz linux-8ae126660fddbeebb9251a174e6fa45b6ad8f932.tar.bz2 linux-8ae126660fddbeebb9251a174e6fa45b6ad8f932.zip | |
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/linear.c')
| -rw-r--r-- | drivers/md/linear.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/drivers/md/linear.c b/drivers/md/linear.c index aefd66142eef..b7fe7e9fc777 100644 --- a/drivers/md/linear.c +++ b/drivers/md/linear.c @@ -52,48 +52,6 @@ static inline struct dev_info *which_dev(struct mddev *mddev, sector_t sector) return conf->disks + lo; } -/** - * linear_mergeable_bvec -- tell bio layer if two requests can be merged - * @q: request queue - * @bvm: properties of new bio - * @biovec: the request that could be merged to it. - * - * Return amount of bytes we can take at this offset - */ -static int linear_mergeable_bvec(struct mddev *mddev, - struct bvec_merge_data *bvm, - struct bio_vec *biovec) -{ - struct dev_info *dev0; - unsigned long maxsectors, bio_sectors = bvm->bi_size >> 9; - sector_t sector = bvm->bi_sector + get_start_sect(bvm->bi_bdev); - int maxbytes = biovec->bv_len; - struct request_queue *subq; - - dev0 = which_dev(mddev, sector); - maxsectors = dev0->end_sector - sector; - subq = bdev_get_queue(dev0->rdev->bdev); - if (subq->merge_bvec_fn) { - bvm->bi_bdev = dev0->rdev->bdev; - bvm->bi_sector -= dev0->end_sector - dev0->rdev->sectors; - maxbytes = min(maxbytes, subq->merge_bvec_fn(subq, bvm, - biovec)); - } - - if (maxsectors < bio_sectors) - maxsectors = 0; - else - maxsectors -= bio_sectors; - - if (maxsectors <= (PAGE_SIZE >> 9 ) && bio_sectors == 0) - return maxbytes; - - if (maxsectors > (maxbytes >> 9)) - return maxbytes; - else - return maxsectors << 9; -} - static int linear_congested(struct mddev *mddev, int bits) { struct linear_conf *conf; @@ -338,7 +296,6 @@ static struct md_personality linear_personality = .size = linear_size, .quiesce = linear_quiesce, .congested = linear_congested, - .mergeable_bvec = linear_mergeable_bvec, }; static int __init linear_init (void) |