From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 12 Nov 2010 05:46:50 +0000 (+0000)
Subject: igmp: RCU conversion of in_dev->mc_list
X-Git-Tag: v2.6.38-rc1~476^2~595
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1d7138de878d1d4210727c1200193e69596f93b3;p=pandora-kernel.git

igmp: RCU conversion of in_dev->mc_list

in_dev->mc_list is protected by one rwlock (in_dev->mc_list_lock).

This can easily be converted to a RCU protection.

Writers hold RTNL, so mc_list_lock is removed, not replaced by a
spinlock.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Cypher Wu <cypher.w@gmail.com>
Cc: Américo Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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