285 	struct iphdr iph;  in ib_ud_ip4_csum()  local
287 	iph.ihl		= 5;  in ib_ud_ip4_csum()
288 	iph.version	= 4;  in ib_ud_ip4_csum()
289 	iph.tos		= header->ip4.tos;  in ib_ud_ip4_csum()
290 	iph.tot_len	= header->ip4.tot_len;  in ib_ud_ip4_csum()
291 	iph.id		= header->ip4.id;  in ib_ud_ip4_csum()
292 	iph.frag_off	= header->ip4.frag_off;  in ib_ud_ip4_csum()
293 	iph.ttl		= header->ip4.ttl;  in ib_ud_ip4_csum()
294 	iph.protocol	= header->ip4.protocol;  in ib_ud_ip4_csum()
295 	iph.check	= 0;  in ib_ud_ip4_csum()
296 	iph.saddr	= header->ip4.saddr;  in ib_ud_ip4_csum()
297 	iph.daddr	= header->ip4.daddr;  in ib_ud_ip4_csum()
299 	return ip_fast_csum((u8 *)&iph, iph.ihl);  in ib_ud_ip4_csum()