[PATCH] ring: fix zero-copy burst API documentation

[Konstantin Ananyev]

> These are burst APIs relying on RTE_RING_QUEUE_VARIABLE behavior, they
> operate on a best-effort basis and return the actual number of
> objects processed (between 0 and n).
> 
> Update description to match implementation.
> 
> Fixes: 47bec9a5ca9f ("ring: add zero copy API")
> 
> Signed-off-by: jinzhiguang <jinzhiguang at kylinos.cn>
> ---
> Cc: honnappa.nagarahalli at arm.com
> Cc: stable at dpdk.org
> ---
>  .mailmap                    | 1 +
>  lib/ring/rte_ring_peek_zc.h | 8 ++++----
>  2 files changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/.mailmap b/.mailmap
> index 4d26d9c286..a4f91f2131 100644
> --- a/.mailmap
> +++ b/.mailmap
> @@ -756,6 +756,7 @@ Jing Chen <jing.d.chen at intel.com>
>  Jingguo Fu <jingguox.fu at intel.com>
>  Jingjing Wu <jingjing.wu at intel.com>
>  Jingzhao Ni <jingzhao.ni at arm.com>
> +jinzhiguang <jinzhiguang at kylinos.cn>
>  Jiri Slaby <jslaby at suse.cz>
>  Job Abraham <job.abraham at intel.com>
>  Jochen Behrens <jochen.behrens at broadcom.com> <jbehrens at vmware.com>
> diff --git a/lib/ring/rte_ring_peek_zc.h b/lib/ring/rte_ring_peek_zc.h
> index 3254fe0481..fa566e8e0d 100644
> --- a/lib/ring/rte_ring_peek_zc.h
> +++ b/lib/ring/rte_ring_peek_zc.h
> @@ -235,7 +235,7 @@ rte_ring_enqueue_zc_bulk_start(struct rte_ring *r,
> unsigned int n,
>   *   If non-NULL, returns the amount of space in the ring after the
>   *   reservation operation has finished.
>   * @return
> - *   The number of objects that can be enqueued, either 0 or n
> + *   Actual number of objects enqueued.

Here and in other places, probably better:
The actual number of objects that can be enqueued.
Acked-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>

>   */
>  static __rte_always_inline unsigned int
>  rte_ring_enqueue_zc_burst_elem_start(struct rte_ring *r, unsigned int esize,
> @@ -265,7 +265,7 @@ rte_ring_enqueue_zc_burst_elem_start(struct rte_ring
> *r, unsigned int esize,
>   *   If non-NULL, returns the amount of space in the ring after the
>   *   reservation operation has finished.
>   * @return
> - *   The number of objects that can be enqueued, either 0 or n.
> + *   Actual number of objects enqueued.
>   */
>  static __rte_always_inline unsigned int
>  rte_ring_enqueue_zc_burst_start(struct rte_ring *r, unsigned int n,
> @@ -442,7 +442,7 @@ rte_ring_dequeue_zc_bulk_start(struct rte_ring *r,
> unsigned int n,
>   *   If non-NULL, returns the number of remaining ring entries after the
>   *   dequeue has finished.
>   * @return
> - *   The number of objects that can be dequeued, either 0 or n.
> + *   Actual number of objects dequeued.
>   */
>  static __rte_always_inline unsigned int
>  rte_ring_dequeue_zc_burst_elem_start(struct rte_ring *r, unsigned int esize,
> @@ -471,7 +471,7 @@ rte_ring_dequeue_zc_burst_elem_start(struct rte_ring
> *r, unsigned int esize,
>   *   If non-NULL, returns the number of remaining ring entries after the
>   *   dequeue has finished.
>   * @return
> - *   The number of objects that can be dequeued, either 0 or n.
> + *   Actual number of objects dequeued.
>   */
>  static __rte_always_inline unsigned int
>  rte_ring_dequeue_zc_burst_start(struct rte_ring *r, unsigned int n,
> --
> 2.53.0