commit caacf05e5ad1abf0a2864863da4e33024bc68ec6
author David S. Miller <davem@davemloft.net> Tue Jul 31 15:06:50 2012 -0700
committer David S. Miller <davem@davemloft.net> Tue Jul 31 15:06:50 2012 -0700
tree 9a82e97a072e288f604bd3dbbe07e1796581fad0
parent c5038a8327b980a5b279fa193163c468011de009

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>