From 86fe8f892013228eef324c42e77c6b54b0bbc6dd Mon Sep 17 00:00:00 2001
From: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Date: Wed, 3 Dec 2014 10:29:40 +0800
Subject: [PATCH] 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>
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