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ipv4: inetdev_by_index() switch to RCU

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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>
This commit is contained in:
Eric Dumazet 2009-11-01 19:23:04 +00:00 committed by David S. Miller
parent 9fdce099bb
commit c148fc2e30
1 changed files with 4 additions and 3 deletions
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7
net/ipv4/devinet.c
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@ -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;
}