commit 6b75e3e8d664a9a1b99d31a7f4976ae70d1d090a
author Eric Dumazet <eric.dumazet@gmail.com> Mon Jul 18 16:08:07 2011 +0200
committer Patrick McHardy <kaber@trash.net> Mon Jul 18 16:08:07 2011 +0200
tree 940d95c340df22db092062bdaea599e9afc4fcf9
parent 131ad62d8fc06d9d0a5c61d9526876352c2f2bbd

netfilter: nfnetlink: add RCU in nfnetlink_rcv_msg()

Goal of this patch is to permit nfnetlink providers not mandate
nfnl_mutex being held while nfnetlink_rcv_msg() calls them.

If struct nfnl_callback contains a non NULL call_rcu(), then
nfnetlink_rcv_msg() will use it instead of call() field, holding
rcu_read_lock instead of nfnl_mutex

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Florian Westphal <fw@strlen.de>
CC: Eric Leblond <eric@regit.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>