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>

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 53422ce26f7fd5a1763ce20fda0c16b0e93c23e2..59c315556a3007635307b8aebf39c77521a8b960 100644 (file)
--- 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[])