cb->param = user_param;
cb->next = rte_eth_devices[port_id].post_rx_burst_cbs[queue_id];
rte_eth_devices[port_id].post_rx_burst_cbs[queue_id] = cb;
cb->param = user_param;
cb->next = rte_eth_devices[port_id].post_rx_burst_cbs[queue_id];
rte_eth_devices[port_id].post_rx_burst_cbs[queue_id] = cb;