tag	line	file	source code
tcp_send_delayed_ack	154	include/net/tcp.h	extern void tcp_send_delayed_ack(struct sock *sk, int timeout);
tcp_send_delayed_ack	1286	net/ipv4/tcp_input.c	tcp_send_delayed_ack(sk, delay);
tcp_send_delayed_ack	835	net/ipv4/tcp_output.c	tcp_send_delayed_ack(sk, HZ/2);