dma_ring_space    401 drivers/net/ethernet/calxeda/xgmac.c 	dma_ring_space((p)->tx_head, (p)->tx_tail, DMA_TX_RING_SZ)
dma_ring_space    683 drivers/net/ethernet/calxeda/xgmac.c 	while (dma_ring_space(priv->rx_head, priv->rx_tail, DMA_RX_RING_SZ) > 1) {