From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 15 Sep 2010 11:07:53 +0000 (+0000)
Subject: gre: get rid of ipgre_lock
X-Git-Tag: v2.6.37-rc1~147^2~438
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1507850b400492fdedc3064d3b8db5e9a1c871e3;p=pandora-kernel.git

gre: get rid of ipgre_lock

As RTNL is held while doing tunnels inserts and deletes, we can remove
ipgre_lock spinlock. My initial RCU conversion was conservative and
converted the rwlock to spinlock, with no RTNL requirement.

Use appropriate rcu annotations and modern lockdep checks as well.

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