btrfs: avoid access to .bi_vcnt directly
authorMing Lei <ming.lei@redhat.com>
Mon, 18 Dec 2017 12:22:11 +0000 (20:22 +0800)
committerJens Axboe <axboe@kernel.dk>
Sat, 6 Jan 2018 16:18:00 +0000 (09:18 -0700)
commita0b60d725e54f1caba4f5dc0dfef68040bcf9a8e
tree0a23c69b7926356efb1ac5d532655e9aa8953e33
parent25d8be77e19224d8f21b363d77b5283c5dc21a57
btrfs: avoid access to .bi_vcnt directly

BTRFS uses bio->bi_vcnt to figure out page numbers, this approach is no
longer valid once we start enabling multipage bvecs.
correct once we start to enable multipage bvec.

Use bio_nr_pages() to do that instead.

Cc: Chris Mason <clm@fb.com>
Cc: Josef Bacik <jbacik@fb.com>
Cc: David Sterba <dsterba@suse.com>
Cc: linux-btrfs@vger.kernel.org
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
fs/btrfs/extent_io.c
fs/btrfs/extent_io.h