ipv6: remove useless spin_lock/spin_unlock
authorDuan Jiong <duanj.fnst@cn.fujitsu.com>
Wed, 3 Dec 2014 02:29:40 +0000 (10:29 +0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 9 Dec 2014 18:18:09 +0000 (13:18 -0500)
commit86fe8f892013228eef324c42e77c6b54b0bbc6dd
treedd1cd91cf0f9279cba9b21322cf0f46ad8171306
parent54ceb9ec6fe8e64067b164e6b161dd63905c059f
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>
net/ipv6/ipv6_sockglue.c