From: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu, 3 Dec 2009 02:29:05 +0000 (+0000)
Subject: net: Allow xfrm_user_net_exit to batch efficiently.
X-Git-Tag: v2.6.33-rc1~388^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d79d792ef9f99cca463b6619a93e860d1c833a6e;p=pandora-kernel.git

net: Allow xfrm_user_net_exit to batch efficiently.

xfrm.nlsk is provided by the xfrm_user module and is access via rcu from
other parts of the xfrm code.  Add xfrm.nlsk_stash a copy of xfrm.nlsk that
will never be set to NULL.  This allows the synchronize_net and
netlink_kernel_release to be deferred until a whole batch of xfrm.nlsk sockets
have been set to NULL.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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