From: Paolo Abeni <pab...@redhat.com>
Date: Wed, 25 Nov 2015 18:05:27 +0100

> After 614732eaa12d, no refcount is mainteined for the vport-vxlan module.
> This allows the userspace to remove such module while vport-vxlan
> devices still exist, which lead to later oops, i.e. when
> the openvswitch module is removed.
> 
> Fixes: 614732eaa12d ("openvswitch: Use regular VXLAN net_device device")
> 
> Signed-off-by: Paolo Abeni <pab...@redhat.com>

This is so error prone, with some vport_ops needing to mark the
module and some don't (because they are in the main openvswitch
driver).

Fix this properly, by making the vport_ops register function be
a macro that sets THIS_MODULE in the vport_ops before passing it
on down to the real registry function.
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