summaryrefslogtreecommitdiff
path: root/include/linux/blkdev.h
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2019-03-03 18:40:36 +0300
committerChristoph Hellwig <hch@lst.de>2019-04-05 09:07:57 +0300
commit3ab3a0313cb8c50391d74e40fd46a3408d8e4de9 (patch)
treeb9bdb0bda3a50d22e7b2a46b9aea199ea83bf63e /include/linux/blkdev.h
parent9d9de535f385a8b3ba0e88ca0abf386c5704bbfc (diff)
downloadlinux-3ab3a0313cb8c50391d74e40fd46a3408d8e4de9.tar.xz
block: add dma_map_bvec helper
Provide a nice little shortcut for mapping a single bvec. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r--include/linux/blkdev.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 74469a4dc0a1..4b85dc066264 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -644,6 +644,10 @@ static inline bool blk_account_rq(struct request *rq)
#define rq_dma_dir(rq) \
(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
+#define dma_map_bvec(dev, bv, dir, attrs) \
+ dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
+ (dir), (attrs))
+
static inline bool queue_is_mq(struct request_queue *q)
{
return q->mq_ops;