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| author |   Kent Overstreet <kmo@daterainc.com> | 2013-10-11 15:45:43 -0700 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-23 22:33:51 -0800 |
| commit | 003b5c5719f159f4f4bf97511c4702a0638313dd (patch) | |
| tree | 1b3cac74e22ae5a87fdb6e3066f2d728913e6e0c /drivers/md/dm-io.c | |
| parent | block: Kill bio_segments()/bi_vcnt usage (diff) | |
| download | linux-dev-003b5c5719f159f4f4bf97511c4702a0638313dd.tar.xz linux-dev-003b5c5719f159f4f4bf97511c4702a0638313dd.zip | |
block: Convert drivers to immutable biovecs
Now that we've got a mechanism for immutable biovecs -
bi_iter.bi_bvec_done - we need to convert drivers to use primitives that
respect it instead of using the bvec array directly.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: NeilBrown <neilb@suse.de>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Diffstat (limited to 'drivers/md/dm-io.c')
| -rw-r--r-- | drivers/md/dm-io.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c index 01558b093307..b2b8a10e8427 100644 --- a/drivers/md/dm-io.c +++ b/drivers/md/dm-io.c @@ -201,26 +201,29 @@ static void list_dp_init(struct dpages *dp, struct page_list *pl, unsigned offse /* * Functions for getting the pages from a bvec. */ -static void bvec_get_page(struct dpages *dp, +static void bio_get_page(struct dpages *dp, struct page **p, unsigned long *len, unsigned *offset) { - struct bio_vec *bvec = (struct bio_vec *) dp->context_ptr; - *p = bvec->bv_page; - *len = bvec->bv_len; - *offset = bvec->bv_offset; + struct bio *bio = dp->context_ptr; + struct bio_vec bvec = bio_iovec(bio); + *p = bvec.bv_page; + *len = bvec.bv_len; + *offset = bvec.bv_offset; } -static void bvec_next_page(struct dpages *dp) +static void bio_next_page(struct dpages *dp) { - struct bio_vec *bvec = (struct bio_vec *) dp->context_ptr; - dp->context_ptr = bvec + 1; + struct bio *bio = dp->context_ptr; + struct bio_vec bvec = bio_iovec(bio); + + bio_advance(bio, bvec.bv_len); } -static void bvec_dp_init(struct dpages *dp, struct bio_vec *bvec) +static void bio_dp_init(struct dpages *dp, struct bio *bio) { - dp->get_page = bvec_get_page; - dp->next_page = bvec_next_page; - dp->context_ptr = bvec; + dp->get_page = bio_get_page; + dp->next_page = bio_next_page; + dp->context_ptr = bio; } /* @@ -457,8 +460,8 @@ static int dp_init(struct dm_io_request *io_req, struct dpages *dp, list_dp_init(dp, io_req->mem.ptr.pl, io_req->mem.offset); break; - case DM_IO_BVEC: - bvec_dp_init(dp, io_req->mem.ptr.bvec); + case DM_IO_BIO: + bio_dp_init(dp, io_req->mem.ptr.bio); break; case DM_IO_VMA: |