On 3/21/19 4:11 PM, Christoph Hellwig wrote:
> Provide a nice little shortcut for mapping a single bvec.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> 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;
>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
