unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = -7
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for sit0 to become free. Usage count = 0
unregister_netdevice: waiting for vcan0 to become free. Usage count = -2