ETH_CACHE_LINE_SIZE
ALIGN((mtu) + ETH_HLEN + 2 * VLAN_HLEN + 2 + ETH_CACHE_LINE_SIZE, \
ETH_CACHE_LINE_SIZE)
p_buf->rx_buffer_size = mtu + 26 + ETH_CACHE_LINE_SIZE;
ETH_CACHE_LINE_SIZE - 1) &
~(ETH_CACHE_LINE_SIZE - 1);