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block: introduce mp_bvec_last_segment()
authorMing Lei <ming.lei@redhat.com>
Fri, 15 Feb 2019 11:13:14 +0000 (19:13 +0800)
committerJens Axboe <axboe@kernel.dk>
Fri, 15 Feb 2019 15:40:11 +0000 (08:40 -0700)
commit45a3fb95298b326ab8175f2bd97bd8666017b692
tree2f613b6fcee60b90ecb3fb9a4371fab448cf9427
parent862e5a5e6fa2c7fd514c179e9ceea27a49a3327f
block: introduce mp_bvec_last_segment()

BTRFS and guard_bio_eod() need to get the last singlepage segment
from one multipage bvec, so introduce this helper to make them happy.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
include/linux/bvec.h