828 	CHECK_SKB_FIELD(csum);  in __copy_skb_header()
2071 		      __wsum csum, const struct skb_checksum_ops *ops)  in __skb_checksum()  argument
2082 		csum = ops->update(skb->data + offset, copy, csum);  in __skb_checksum()
2084 			return csum;  in __skb_checksum()
2106 			csum = ops->combine(csum, csum2, pos, copy);  in __skb_checksum()
2108 				return csum;  in __skb_checksum()
2127 			csum = ops->combine(csum, csum2, pos, copy);  in __skb_checksum()
2129 				return csum;  in __skb_checksum()
2137 	return csum;  in __skb_checksum()
2142 		    int len, __wsum csum)  in skb_checksum()  argument
2149 	return __skb_checksum(skb, offset, len, csum, &ops);  in skb_checksum()
2156 				    u8 *to, int len, __wsum csum)  in skb_copy_and_csum_bits()  argument
2167 		csum = csum_partial_copy_nocheck(skb->data + offset, to,  in skb_copy_and_csum_bits()
2168 						 copy, csum);  in skb_copy_and_csum_bits()
2170 			return csum;  in skb_copy_and_csum_bits()
2195 			csum = csum_block_add(csum, csum2, pos);  in skb_copy_and_csum_bits()
2197 				return csum;  in skb_copy_and_csum_bits()
2218 			csum = csum_block_add(csum, csum2, pos);  in skb_copy_and_csum_bits()
2220 				return csum;  in skb_copy_and_csum_bits()
2228 	return csum;  in skb_copy_and_csum_bits()
2332 	__wsum csum;  in skb_copy_and_csum_dev()  local
2344 	csum = 0;  in skb_copy_and_csum_dev()
2346 		csum = skb_copy_and_csum_bits(skb, csstart, to + csstart,  in skb_copy_and_csum_dev()
2352 		*((__sum16 *)(to + csstuff)) = csum_fold(csum);  in skb_copy_and_csum_dev()
3014 	bool csum;  in skb_segment()  local
3027 	csum = !head_skb->encap_hdr_csum &&  in skb_segment()
3123 			nskb->csum = skb_copy_and_csum_bits(head_skb, offset,  in skb_segment()
3193 		if (!csum && !nskb->remcsum_offload) {  in skb_segment()
3194 			nskb->csum = skb_checksum(nskb, doffset,  in skb_segment()
3866 	__sum16 *csum;  in skb_checksum_setup_ipv4()  local
3887 	csum = skb_checksum_setup_ip(skb, ip_hdr(skb)->protocol, off);  in skb_checksum_setup_ipv4()
3888 	if (IS_ERR(csum))  in skb_checksum_setup_ipv4()
3889 		return PTR_ERR(csum);  in skb_checksum_setup_ipv4()
3892 		*csum = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,  in skb_checksum_setup_ipv4()
3918 	__sum16 *csum;  in skb_checksum_setup_ipv6()  local
3996 	csum = skb_checksum_setup_ip(skb, nexthdr, off);  in skb_checksum_setup_ipv6()
3997 	if (IS_ERR(csum))  in skb_checksum_setup_ipv6()
3998 		return PTR_ERR(csum);  in skb_checksum_setup_ipv6()
4001 		*csum = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,  in skb_checksum_setup_ipv6()
4351 			skb->csum = csum_add(skb->csum, csum_partial(skb->data  in skb_vlan_push()