[PATCH 2/3] net: Guaranetee the proper ordering of the loopback device.

[David Miller]

From: ebiederm at xmission.com (Eric W. Biederman)
Date: Wed, 05 Nov 2008 15:25:39 -0800

> 
> I was recently hunting a bug that occurred in network namespace
> cleanup.  In looking at the code it became apparrent that we have
> and will continue to have cases where if we have anything going
> on in a network namespace there will be assumptions that the
> loopback device is present.   Things like sending igmp unsubscribe
> messages when we bring down network devices invokes the routing
> code which assumes that at least the loopback driver is present.
> 
> Therefore to avoid magic initcall ordering hackery that is hard
> to follow and hard to get right insert a call to register the
> loopback device directly from net_dev_init().    This guarantes
> that the loopback device is the first device registered and
> the last network device to go away.
> 
> Signed-off-by: Eric W. Biederman <ebiederm at xmission.com>

Applied.