From: Sven Eckelmann <sven.eckelmann@gmx.de>
Date: Sat, 18 Sep 2010 19:01:15 +0000 (+0200)
Subject: Staging: batman-adv: Introduce if_list_lock to protect if_list
X-Git-Tag: v2.6.37-rc1~60^2~3^2~550
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af2ac7bfec4176cad5e04402d116b5242d759bf8;p=pandora-kernel.git

Staging: batman-adv: Introduce if_list_lock to protect if_list

The update critical sections of if_list must be protected by a locking
primitive other than RCU. The iterator must also be protected by the
chosen locking mechanism.

The rtnl_lock in hardif_remove_interfaces must also be moved outside the
iterator primitive to ensure that we don't deadlock the kernel due to
differently nested locks in hardif_remove_interfaces and hard_if_event.

Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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