On 3/21/19 4:11 PM, Christoph Hellwig wrote:
> Return the currently active bvec segment, potentially spanning multiple
> pages.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> 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;
Quick question here mostly for my understanding, do we also have to
check here for nr_phys_segments for the operations such as write-zeroes ? OR
this may never get called in write-zeroes context ? OR
not applicable ?
> + 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)
> {
>
Otherwise, looks good.
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
