[PATCH V14 10/18] btrfs: use mp_bvec_last_segment to get bio's last page

Ming Lei
2019-01-21T08:20:57Z

Preparing for supporting multi-page bvec.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
fs/btrfs/extent_io.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index dc8ba3ee515d..986ef49b0269 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -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;

--
2.9.5