[PATCH net-next] net: page_pool: Add page_pool_put_page_bulk() to page_pool.rst

[Lorenzo Bianconi <lorenzo@kernel.org>]

Introduce page_pool_put_page_bulk() entry into the API section of
page_pool.rst

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 Documentation/networking/page_pool.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/networking/page_pool.rst b/Documentation/networking/page_pool.rst
index 43088ddf95e4..e848f5b995b8 100644
--- a/Documentation/networking/page_pool.rst
+++ b/Documentation/networking/page_pool.rst
@@ -97,6 +97,14 @@ a page will cause no race conditions is enough.
 
 * page_pool_get_dma_dir(): Retrieve the stored DMA direction.
 
+* page_pool_put_page_bulk(): It tries to refill a bulk of count pages into the
+  ptr_ring cache holding ptr_ring producer lock. If the ptr_ring is full,
+  page_pool_put_page_bulk() will release leftover pages to the page allocator.
+  page_pool_put_page_bulk() is suitable to be run inside the driver NAPI tx
+  completion loop for the XDP_REDIRECT use case.
+  Please consider the caller must not use data area after running
+  page_pool_put_page_bulk(), as this function overwrites it.
+
 Coding examples
 ===============
 
-- 
2.28.0