tbnet_ring
struct tbnet_ring rx_ring;
struct tbnet_ring tx_ring;
static void tbnet_free_buffers(struct tbnet_ring *ring)
static unsigned int tbnet_available_buffers(const struct tbnet_ring *ring)
struct tbnet_ring *ring = &net->rx_ring;
struct tbnet_ring *ring = &net->tx_ring;
struct tbnet_ring *ring = &net->tx_ring;