ipv4: inetdev_by_index() switch to RCU

Use dev_get_by_index_rcu() instead of __dev_get_by_index() and
dev_base_lock rwlock

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

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 5df2f6a..ccccaae 100644 (file)
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -405,11 +405,12 @@ struct in_device *inetdev_by_index(struct net *net, int ifindex)
 {
        struct net_device *dev;
        struct in_device *in_dev = NULL;
-       read_lock(&dev_base_lock);
-       dev = __dev_get_by_index(net, ifindex);
+
+       rcu_read_lock();
+       dev = dev_get_by_index_rcu(net, ifindex);
        if (dev)
                in_dev = in_dev_get(dev);
-       read_unlock(&dev_base_lock);
+       rcu_read_unlock();
        return in_dev;
 }