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btrfs: use mp_bvec_last_segment to get bio's last page 

Preparing for supporting multi-page bvec.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2019-02-15 19:13:16 +08:00 committed by Jens Axboe
parent f70f446407
commit c3a7ce7380
1 changed files with 3 additions and 2 deletions
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5
fs/btrfs/extent_io.c
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@ -2697,11 +2697,12 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
{
blk_status_t ret = 0;
struct bio_vec *bvec = bio_last_bvec_all(bio);
struct page *page = bvec->bv_page;
struct bio_vec bv;
struct extent_io_tree *tree = bio->bi_private;
u64 start;
start = page_offset(page) + bvec->bv_offset;
mp_bvec_last_segment(bvec, &bv);
start = page_offset(bv.bv_page) + bv.bv_offset;
bio->bi_private = NULL;