[RFC Patch net-next 5/6] net_sched: use rcu in fast path

[Cong Wang]

Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/sched/act_api.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 2f8db3c..fb6ff52 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -470,10 +470,14 @@ int tcf_action_exec(struct sk_buff *skb, struct tc_action 
**actions,
                goto exec_done;
        }
        for (i = 0; i < nr_actions; i++) {
-               const struct tc_action *a = actions[i];
+               const struct tc_action *a;
 
+               rcu_read_lock();
+               a = rcu_dereference(actions[i]);
 repeat:
                ret = a->ops->act(skb, a, res);
+               rcu_read_unlock();
+
                if (ret == TC_ACT_REPEAT)
                        goto repeat;    /* we need a ttl - JHS */
                if (ret != TC_ACT_PIPE)
-- 
2.1.0