[PATCH 03/15 net-next,v2] net: sched: add tcf_block_cb_free()

[Pablo Neira Ayuso <pablo@netfilter.org>]

Just a stub to release tcf_block_cb objects, follow up patch extends it
to have a release callback in it for the private data.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
v2: no changes.

 include/net/pkt_cls.h | 5 +++++
 net/sched/cls_api.c   | 6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index a756d895c7a4..b50df3b9456c 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -74,6 +74,7 @@ static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
 
 struct tcf_block_cb *tcf_block_cb_alloc(tc_setup_cb_t *cb,
 					void *cb_ident, void *cb_priv);
+void tcf_block_cb_free(struct tcf_block_cb *block_cb);
 void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
 struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
 					 tc_setup_cb_t *cb, void *cb_ident);
@@ -158,6 +159,10 @@ tcf_block_cb_alloc(tc_setup_cb_t *cb, void *cb_ident, void *cb_priv)
 	return ERR_PTR(-EOPNOTSUPP);
 }
 
+static inline void tcf_block_cb_free(struct tcf_block_cb *block_cb)
+{
+}
+
 static inline
 void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
 {
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index 6cd76e3df2be..93b74a15e7ac 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -763,6 +763,12 @@ struct tcf_block_cb *tcf_block_cb_alloc(tc_setup_cb_t *cb,
 }
 EXPORT_SYMBOL(tcf_block_cb_alloc);
 
+void tcf_block_cb_free(struct tcf_block_cb *block_cb)
+{
+	kfree(block_cb);
+}
+EXPORT_SYMBOL(tcf_block_cb_free);
+
 struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
 					     tc_setup_cb_t *cb, void *cb_ident,
 					     void *cb_priv,
-- 
2.11.0