HelenOS sources

RX_RING_SIZE      255 uspace/drv/nic/rtl8169/driver.c 	rc = dmamem_map_anonymous(RX_RING_SIZE, DMAMEM_4GiB,
RX_RING_SIZE      265 uspace/drv/nic/rtl8169/driver.c 	memset(rtl8169->rx_ring, 0, RX_RING_SIZE);