Virtualization - Dec 2014 - loading upstream v3.18-11290-g44e8967: virtio_pci: unknown symbols

Hi list, I'm having a problem at boot before root mounts.

virtio_pci fails to load because of unknown symbols:
vring_transport_features
irq_set_affinity_hint

... and more.

Is drivers/virtio/virtio_pci_legacy.c missing MODULE_LICENSE("GPL"); ?

Not sure if that's the right fix or I'm doing something stupid..

Ben