tb_ring_start
tb_ring_start(net->tx_ring.ring);
tb_ring_start(net->rx_ring.ring);
tb_ring_start(ctl->tx); /* is used to ack hotplug packets, start first */
tb_ring_start(ctl->rx);
tb_ring_start(dt->tx_ring);
tb_ring_start(dt->rx_ring);
EXPORT_SYMBOL_GPL(tb_ring_start);
void tb_ring_start(struct tb_ring *ring);