38  *	@partial_cov: if set indicates partial csum coverage
133 	__wsum csum = csum_partial(skb_transport_header(skb),  in udp_csum_outgoing()  local
136 		csum = csum_add(csum, skb->csum);  in udp_csum_outgoing()
138 	return csum;  in udp_csum_outgoing()
143 	__wsum csum = csum_partial(skb_transport_header(skb),  in udp_csum()  local
144 				   sizeof(struct udphdr), skb->csum);  in udp_csum()
147 		csum = csum_add(csum, skb->csum);  in udp_csum()
149 	return csum;  in udp_csum()
164 		skb->csum = csum_partial(skb->data, sizeof(struct udphdr),  in udp_csum_pull_header()
165 					 skb->csum);  in udp_csum_pull_header()
465 	/* Avoid csum recalculation by skb_segment unless userspace explicitly  in udp_rcv_segment()
511 	 * have a valid checksum, as the GRO engine validates the UDP csum  in udp_post_segment_fix_csum()
514 	 * a valid csum after the segmentation.  in udp_post_segment_fix_csum()