tag	line	file	source code
ip_fast_csum	494	net/inet/ip.c	return ip_fast_csum((unsigned char *)iph, iph->ihl);
ip_fast_csum	502	net/inet/ip.c	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
ip_fast_csum	1191	net/inet/ip.c	if (iph->version != 4 || ip_fast_csum((unsigned char *)iph, iph->ihl) !=0) {