From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Thu, 28 Jul 2011 04:32:25 +0000 (+0000)
Subject: ip6tnl: avoid touching dst refcount in ip6_tnl_xmit2()
X-Git-Tag: v3.2-rc1~129^2~597
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=89b0212697e92bc59a021a2338cd8c09f919325c;p=pandora-kernel.git

ip6tnl: avoid touching dst refcount in ip6_tnl_xmit2()

Even using percpu stats, we still hit tunnel dst_entry refcount in
ip6_tnl_xmit2()

Since we are in RCU locked section, we can use skb_dst_set_noref() and
avoid these atomic operations, leaving dst shared on cpus.

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