tree c90a8aadc10ac9a9e7b67b2d36ce61853917e3ba
parent e0c5567d06ecf7777b6c46f4d933a0a6e09a44f3
author Eric Dumazet <eric.dumazet@gmail.com> 1255979929 +0000
committer David S. Miller <davem@davemloft.net> 1256805775 -0700

net: Introduce dev_get_by_index_rcu()

Some workloads hit dev_base_lock rwlock pretty hard.
We can use RCU lookups to avoid touching this rwlock.

netdevices are already freed after a RCU grace period, so this patch
adds no penalty at device dismantle time.

dev_ifname() converted to dev_get_by_index_rcu()

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