bio: make use of bvec_nr_vecs
Denis ChengRq authored
Since introduced in 7ba1ba12

, it should be made use of.
Signed-off-by: default avatarDenis ChengRq <crquan@gmail.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
1ac0ae06