[PATCH] net/tap: add deprecation notice for RTE_FLOW_ACTION_RSS

[Stephen Hemminger <stephen@networkplumber.org>]

The BPF infrastructure in kernel changed which broke the method
being used to load the RSS part of rte_flow in the TAP device.
Since this is a little used feature, and fixing the problem would
be moderately complex and create new dependency on libbpf,
mark the feature as deprecated and plan for removal.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 doc/guides/rel_notes/deprecation.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 81b93515cbd9..7d9012ada2d7 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -146,3 +146,8 @@ Deprecation Notices
   will be deprecated and subsequently removed in DPDK 24.11 release.
   Before this, the new port library API (functions rte_swx_port_*)
   will gradually transition from experimental to stable status.
+
+* tap: The support for RTE_FLOW_ACTION_TYPE_RSS is deprecated and
+  will be removed in DPDK 24.11 release. It is already broken on recent
+  Linux kernels due to changes in how BPF programs are loaded,
+  and will not be fixed.
-- 
2.43.0