tb_ring_free
tb_ring_free(net->tx_ring.ring);
tb_ring_free(net->tx_ring.ring);
tb_ring_free(net->rx_ring.ring);
tb_ring_free(net->tx_ring.ring);
tb_ring_free(ctl->rx);
tb_ring_free(ctl->tx);
tb_ring_free(dt->rx_ring);
tb_ring_free(dt->tx_ring);
EXPORT_SYMBOL_GPL(tb_ring_free);
void tb_ring_free(struct tb_ring *ring);