On Thu, Mar 18 2021 at 12:48pm -0400,
Ming Lei <ming.lei@xxxxxxxxxx> wrote:
> There is a hole at the end of 'struct bvec_iter', so put a new field
> here and we can save cookie returned from submit_bio() here for
> supporting bio based polling.
>
> This way can avoid to extend bio unnecessarily.
>
> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
> ---
> include/linux/bvec.h | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/include/linux/bvec.h b/include/linux/bvec.h
> index ff832e698efb..61c0f55f7165 100644
> --- a/include/linux/bvec.h
> +++ b/include/linux/bvec.h
> @@ -43,6 +43,15 @@ struct bvec_iter {
>
> unsigned int bi_bvec_done; /* number of bytes completed in
> current bvec */
> +
> + /*
> + * There is a hole at the end of bvec_iter, define one filed to
s/filed/field/
> + * hold something which isn't relate with 'bvec_iter', so that we can
s/relate/related/
or
s/isn't relate with/doesn't relate to/
> + * avoid to extend bio. So far this new field is used for bio based
s/to extend/extending/
> + * pooling, we will store returning value of underlying queue's
s/pooling/polling/
> + * submit_bio() here.
> + */
> + unsigned int bi_private_data;
> };
>
> struct bvec_iter_all {
> --
> 2.29.2
>
