inet: use call_rcu_hurry() in inet_free_ifa()

This is a followup of commit c4e86b4363ac ("net: add two more
call_rcu_hurry()")

Our reference to ifa->ifa_dev must be freed ASAP
to release the reference to the netdev the same way.

inet_rcu_free_ifa()

	in_dev_put()
	 -> in_dev_finish_destroy()
	   -> netdev_put()

This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 7592f242336b7fdf67e79dbd75407cf03e841cfc..364dbf0cd9bf2f6e96a221317c88dad965209659 100644 (file)
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -224,6 +224,7 @@ static struct in_ifaddr *inet_alloc_ifa(void)
 static void inet_rcu_free_ifa(struct rcu_head *head)
 {
        struct in_ifaddr *ifa = container_of(head, struct in_ifaddr, rcu_head);
+
        if (ifa->ifa_dev)
                in_dev_put(ifa->ifa_dev);
        kfree(ifa);
@@ -231,7 +232,11 @@ static void inet_rcu_free_ifa(struct rcu_head *head)
 
 static void inet_free_ifa(struct in_ifaddr *ifa)
 {
-       call_rcu(&ifa->rcu_head, inet_rcu_free_ifa);
+       /* Our reference to ifa->ifa_dev must be freed ASAP
+        * to release the reference to the netdev the same way.
+        * in_dev_put() -> in_dev_finish_destroy() -> netdev_put()
+        */
+       call_rcu_hurry(&ifa->rcu_head, inet_rcu_free_ifa);
 }
 
 static void in_dev_free_rcu(struct rcu_head *head)