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

[jinzhiguang]

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.
  */
 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