tree dd1cd91cf0f9279cba9b21322cf0f46ad8171306
parent 54ceb9ec6fe8e64067b164e6b161dd63905c059f
author Duan Jiong <duanj.fnst@cn.fujitsu.com> 1417573780 +0800
committer David S. Miller <davem@davemloft.net> 1418149089 -0500

ipv6: remove useless spin_lock/spin_unlock

xchg is atomic, so there is no necessary to use spin_lock/spin_unlock
to protect it. At last, remove the redundant
opt = xchg(&inet6_sk(sk)->opt, opt); statement.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>