macvlan: use call_rcu for port free

Use call_rcu rather than synchronize_rcu.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 53422ce26f7f..59c315556a30 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -37,6 +37,7 @@ struct macvlan_port {
         struct net_device       *dev;
         struct hlist_head       vlan_hash[MACVLAN_HASH_SIZE];
         struct list_head        vlans;
+        struct rcu_head         rcu;
 };
 
 static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
@@ -540,14 +541,21 @@ static int macvlan_port_create(struct net_device *dev)
         return err;
 }
 
+static void macvlan_port_rcu_free(struct rcu_head *head)
+{
+        struct macvlan_port *port;
+
+        port = container_of(head, struct macvlan_port, rcu);
+        kfree(port);
+}
+
 static void macvlan_port_destroy(struct net_device *dev)
 {
         struct macvlan_port *port = dev->macvlan_port;
 
         netdev_rx_handler_unregister(dev);
         rcu_assign_pointer(dev->macvlan_port, NULL);
-        synchronize_rcu();
-        kfree(port);
+        call_rcu(&port->rcu, macvlan_port_rcu_free);
 }
 
 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])