883 			__u16	csum_start;  member
2628 	return skb->csum_start - skb_headroom(skb);  in skb_checksum_start_offset()
2633 	return skb->head + skb->csum_start;  in skb_checksum_start()
4173 	skb->csum_start = ((unsigned char *)ptr + start) - skb->head;  in skb_remcsum_adjust_partial()
4486 	__u16	csum_start;  member
4519 	SKB_GSO_CB(skb)->csum_start = skb_checksum_start(skb) - skb->head;  in gso_reset_checksum()
4532 	unsigned char *csum_start = skb_transport_header(skb);  in gso_make_checksum()  local
4533 	int plen = (skb->head + SKB_GSO_CB(skb)->csum_start) - csum_start;  in gso_make_checksum()
4537 	SKB_GSO_CB(skb)->csum_start = csum_start - skb->head;  in gso_make_checksum()
4539 	return csum_fold(csum_partial(csum_start, plen, partial));  in gso_make_checksum()
4658 	unsigned char *csum_start = skb_checksum_start(skb);  in lco_csum()  local
4663 	partial = ~csum_unfold(*(__force __sum16 *)(csum_start +  in lco_csum()
4669 	return csum_partial(l4_hdr, csum_start - l4_hdr, partial);  in lco_csum()