Provide a nice little shortcut for mapping a single bvec.
Signed-off-by: Christoph Hellwig <[email protected]>
---
include/linux/blkdev.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5279104527ad..322ff969659c 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -641,6 +641,10 @@ 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;
--
2.20.1
