tree 27f69a0cce85e6e464684e0660809cf7fc4964be
parent 5010e948420ea1cff85f6c2f64ec7a011aea3d07
author WANG Cong <xiyou.wangcong@gmail.com> 1493399069 -0700
committer David S. Miller <davem@davemloft.net> 1493606644 -0400

ipv4: get rid of ip_ra_lock

After commit 1215e51edad1 ("ipv4: fix a deadlock in ip_ra_control")
we always take RTNL lock for ip_ra_control() which is the only place
we update the list ip_ra_chain, so the ip_ra_lock is no longer needed.

As Eric points out, BH does not need to disable either, RCU readers
don't care.

Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>