From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 15 Jun 2010 11:08:51 +0000 (+0200)
Subject: netfilter: CLUSTERIP: RCU conversion
X-Git-Tag: v2.6.36-rc1~571^2~577^2~2
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d73f33b16883;p=pandora-kernel.git

netfilter: CLUSTERIP: RCU conversion

- clusterip_lock becomes a spinlock
- lockless lookups
- kfree() deferred after RCU grace period
- rcu_barrier_bh() inserted in clusterip_tg_exit()

v2)
- As Patrick pointed out, we use atomic_inc_not_zero() in
clusterip_config_find_get().
- list_add_rcu() and list_del_rcu() variants are used.
- atomic_dec_and_lock() used in clusterip_config_entry_put()

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
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