From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 29 Oct 2010 03:09:24 +0000 (+0000)
Subject: decnet: RCU conversion and get rid of dev_base_lock
X-Git-Tag: v2.6.38-rc1~476^2~623
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0;p=pandora-kernel.git

decnet: RCU conversion and get rid of dev_base_lock

While tracking dev_base_lock users, I found decnet used it in
dnet_select_source(), but for a wrong purpose:

Writers only hold RTNL, not dev_base_lock, so readers must use RCU if
they cannot use RTNL.

Adds an rcu_head in struct dn_ifaddr and handle proper RCU management.

Adds __rcu annotation in dn_route as well.

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