[PATCH 01/15] block: add a req_bvec helper
From: Christoph Hellwig <hch@lst.de>
Date: 2019-03-21 23:11:06
Also in:
linux-nvme
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
Return the currently active bvec segment, potentially spanning multiple pages. Signed-off-by: Christoph Hellwig <hch@lst.de> --- include/linux/blkdev.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0de92b29f589..255e20313cde 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h@@ -929,6 +929,13 @@ static inline unsigned int blk_rq_payload_bytes(struct request *rq) return blk_rq_bytes(rq); } +static inline struct bio_vec req_bvec(struct request *rq) +{ + if (rq->rq_flags & RQF_SPECIAL_PAYLOAD) + return rq->special_vec; + return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter); +} + static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q, int op) {
--
2.20.1