From: Daniel Borkmann <dborkman@redhat.com>
Date: Tue, 10 Dec 2013 11:02:03 +0000 (+0100)
Subject: net: ovs: use kfree_rcu instead of rcu_free_{sw_flow_mask_cb,acts_callback}
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=11d6c461b32a3fb7e89f91ef7fa54c5446335a9c;p=openwrt%2Fstaging%2Fblogic.git

net: ovs: use kfree_rcu instead of rcu_free_{sw_flow_mask_cb,acts_callback}

As we're only doing a kfree() anyway in the RCU callback, we can
simply use kfree_rcu, which does the same job, and remove the
function rcu_free_sw_flow_mask_cb() and rcu_free_acts_callback().

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
---

diff --git a/net/openvswitch/flow_netlink.c b/net/openvswitch/flow_netlink.c
index 3ccb92f48502..4d000acaed0d 100644
--- a/net/openvswitch/flow_netlink.c
+++ b/net/openvswitch/flow_netlink.c
@@ -1176,19 +1176,11 @@ struct sw_flow_actions *ovs_nla_alloc_flow_actions(int size)
 	return sfa;
 }
 
-/* RCU callback used by ovs_nla_free_flow_actions. */
-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_nla_free_flow_actions(struct sw_flow_actions *sf_acts)
 {
-	call_rcu(&sf_acts->rcu, rcu_free_acts_callback);
+	kfree_rcu(sf_acts, rcu);
 }
 
 static struct nlattr *reserve_sfa_size(struct sw_flow_actions **sfa,
diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 299ea8bb400c..099a1a9a3068 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -155,13 +155,6 @@ static void rcu_free_flow_callback(struct rcu_head *rcu)
 	flow_free(flow);
 }
 
-static void rcu_free_sw_flow_mask_cb(struct rcu_head *rcu)
-{
-	struct sw_flow_mask *mask = container_of(rcu, struct sw_flow_mask, rcu);
-
-	kfree(mask);
-}
-
 static void flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
 {
 	if (!mask)
@@ -173,7 +166,7 @@ static void flow_mask_del_ref(struct sw_flow_mask *mask, bool deferred)
 	if (!mask->ref_count) {
 		list_del_rcu(&mask->list);
 		if (deferred)
-			call_rcu(&mask->rcu, rcu_free_sw_flow_mask_cb);
+			kfree_rcu(mask, rcu);
 		else
 			kfree(mask);
 	}