943 csum_page(struct page *page, int offset, int copy)  in csum_page()  argument
948 	csum = csum_partial(kaddr + offset, copy, 0);  in csum_page()
971 	int copy;  in __ip_append_data()  local
1042 		copy = mtu - skb->len;  in __ip_append_data()
1043 		if (copy < length)  in __ip_append_data()
1044 			copy = maxfraglen - skb->len;  in __ip_append_data()
1045 		if (copy <= 0) {  in __ip_append_data()
1132 			copy = datalen - transhdrlen - fraggap - pagedlen;  in __ip_append_data()
1133 			if (copy > 0 && getfrag(from, data + transhdrlen, offset, copy, fraggap, skb) < 0) {  in __ip_append_data()
1139 			offset += copy;  in __ip_append_data()
1140 			length -= copy + transhdrlen;  in __ip_append_data()
1167 		if (copy > length)  in __ip_append_data()
1168 			copy = length;  in __ip_append_data()
1171 		    skb_tailroom(skb) >= copy) {  in __ip_append_data()
1175 			if (getfrag(from, skb_put(skb, copy),  in __ip_append_data()
1176 					offset, copy, off, skb) < 0) {  in __ip_append_data()
1199 			copy = min_t(int, copy, pfrag->size - pfrag->offset);  in __ip_append_data()
1202 				    offset, copy, skb->len, skb) < 0)  in __ip_append_data()
1205 			pfrag->offset += copy;  in __ip_append_data()
1206 			skb_frag_size_add(&skb_shinfo(skb)->frags[i - 1], copy);  in __ip_append_data()
1207 			skb->len += copy;  in __ip_append_data()
1208 			skb->data_len += copy;  in __ip_append_data()
1209 			skb->truesize += copy;  in __ip_append_data()
1210 			wmem_alloc_delta += copy;  in __ip_append_data()
1212 			err = skb_zerocopy_iter_dgram(skb, from, copy);  in __ip_append_data()
1216 		offset += copy;  in __ip_append_data()
1217 		length -= copy;  in __ip_append_data()