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openvswitch: using kfree_rcu() to simplify the code 

The callback function of call_rcu() just calls a kfree(), so we
can use kfree_rcu() instead of call_rcu() + callback function.

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Yongjun 2012-08-26 18:20:45 +00:00 committed by David S. Miller
parent fc61b928dc
commit 80f0fd8a7f
1 changed files with 1 additions and 9 deletions
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10
net/openvswitch/flow.c
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@ -427,19 +427,11 @@ void ovs_flow_deferred_free(struct sw_flow *flow)
call_rcu(&flow->rcu, rcu_free_flow_callback);
}
/* RCU callback used by ovs_flow_deferred_free_acts. */
static void rcu_free_acts_callback(struct rcu_head *rcu)
{
struct sw_flow_actions *sf_acts = container_of(rcu,
struct sw_flow_actions, rcu);
kfree(sf_acts);
}
/* Schedules 'sf_acts' to be freed after the next RCU grace period.
* The caller must hold rcu_read_lock for this to be sensible. */
void ovs_flow_deferred_free_acts(struct sw_flow_actions *sf_acts)
{
call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
kfree_rcu(sf_acts, rcu);
}
static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)