189 	int hdr_len;  in parse_gre_header()  local
199 	hdr_len = ip_gre_calc_hlen(tpi->flags);  in parse_gre_header()
201 	if (!pskb_may_pull(skb, hdr_len))  in parse_gre_header()
238 			hdr_len += 4;  in parse_gre_header()
239 			if (!pskb_may_pull(skb, hdr_len))  in parse_gre_header()
243 	return hdr_len;  in parse_gre_header()
424 	int hdr_len;  in gre_rcv()  local
434 	hdr_len = parse_gre_header(skb, &tpi, &csum_err);  in gre_rcv()
435 	if (hdr_len < 0)  in gre_rcv()
437 	if (iptunnel_pull_header(skb, hdr_len, tpi.proto) < 0)  in gre_rcv()
449 static void build_header(struct sk_buff *skb, int hdr_len, __be16 flags,  in build_header()  argument
454 	skb_push(skb, hdr_len);  in build_header()
462 		__be32 *ptr = (__be32 *)(((u8 *)greh) + hdr_len - 4);  in build_header()