From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue, 23 Nov 2010 13:12:15 +0000 (+0000)
Subject: ipv6: mcast: RCU conversion
X-Git-Tag: v2.6.38-rc1~476^2~458
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=456b61bca8ee324ab6c18b065e632c9a8c88aa39;p=pandora-kernel.git

ipv6: mcast: RCU conversion

ipv6_sk_mc_lock rwlock becomes a spinlock.

readers (inet6_mc_check()) now takes rcu_read_lock() instead of read
lock. Writers dont need to disable BH anymore.

struct ipv6_mc_socklist objects are reclaimed after one RCU grace
period.

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