From: David S. Miller <davem@davemloft.net>
Date: Tue, 31 Jul 2012 22:06:50 +0000 (-0700)
Subject: ipv4: Properly purge netdev references on uncached routes.
X-Git-Tag: v3.6-rc1~30^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=caacf05e5ad1abf0a2864863da4e33024bc68ec6;p=pandora-kernel.git

ipv4: Properly purge netdev references on uncached routes.

When a device is unregistered, we have to purge all of the
references to it that may exist in the entire system.

If a route is uncached, we currently have no way of accomplishing
this.

So create a global list that is scanned when a network device goes
down.  This mirrors the logic in net/core/dst.c's dst_ifdown().

Signed-off-by: David S. Miller <davem@davemloft.net>
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