tag	line	file	source code
ip_fast_csum	505	net/inet/ip.c	return ip_fast_csum((unsigned char *)iph, iph->ihl);
ip_fast_csum	513	net/inet/ip.c	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
ip_fast_csum	1205	net/inet/ip.c	if (skb->len<sizeof(struct iphdr) || iph->ihl<5 || iph->version != 4 || ip_fast_csum((unsigned char *)iph, iph->ihl) !=0) {