[PATCH net-next 1/4] docs: net: page_pool: drop reference to removed PP_FLAG_PAGE_FRAG

[Jakub Kicinski <kuba@kernel.org>]

The flag was removed in commit 09d96ee5674a ("page_pool: remove
PP_FLAG_PAGE_FRAG"), but the documentation still mentions it when
describing fragment usage. Drop the stale reference; the fragment
API does not require any opt-in flag.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 Documentation/networking/page_pool.rst | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/networking/page_pool.rst b/Documentation/networking/page_pool.rst
index 9d958128a57c..6e43e1953218 100644
--- a/Documentation/networking/page_pool.rst
+++ b/Documentation/networking/page_pool.rst
@@ -98,9 +98,8 @@ If in doubt set ``offset`` to 0, ``max_len`` to ``PAGE_SIZE`` and
 pass -1 as ``dma_sync_size``. That combination of arguments is always
 correct.
 
-Note that the syncing parameters are for the entire page.
-This is important to remember when using fragments (``PP_FLAG_PAGE_FRAG``),
-where allocated buffers may be smaller than a full page.
+Note that the syncing parameters are for the **entire page**, even if
+the driver allocates fragments (e.g. via ``page_pool_dev_alloc_frag()``).
 Unless the driver author really understands page pool internals
 it's recommended to always use ``offset = 0``, ``max_len = PAGE_SIZE``
 with fragmented page pools.
-- 
2.54.0