240 	uint8_t csum_len = 0;  in mptcp_send_infinite_mapping()  local
252 		csum_len = 2;  in mptcp_send_infinite_mapping()
256 	if ((MAX_TCPOPTLEN - optlen) < (len + csum_len)) {  in mptcp_send_infinite_mapping()
262 	infin_opt.mdss_copt.mdss_len = len + csum_len;  in mptcp_send_infinite_mapping()
293 	if (csum_len != 0) {  in mptcp_send_infinite_mapping()
296 		memcpy(opt + optlen, &csum, csum_len);  in mptcp_send_infinite_mapping()
297 		optlen += csum_len;  in mptcp_send_infinite_mapping()
1216 	int csum_len = 0;  in mptcp_do_dss_opt_meat()  local
1228 		csum_len = 2;  in mptcp_do_dss_opt_meat()
1240 		    sizeof(struct mptcp_dsn_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1241 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1246 			    (dss_rsp1->mdss_copt.mdss_len - csum_len)));  in mptcp_do_dss_opt_meat()
1274 		    sizeof(struct mptcp_dss_ack_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1287 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1288 			csum = *(uint16_t *)(void *)(cp + (dss_ack_rsp->mdss_copt.mdss_len - csum_len));  in mptcp_do_dss_opt_meat()
1307 		    sizeof(struct mptcp_dsn64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1315 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1316 			csum = *(uint16_t *)(void *)(cp + dsn64->mdss_copt.mdss_len - csum_len);  in mptcp_do_dss_opt_meat()
1349 		    sizeof(struct mptcp_dss64_ack32_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1362 		if (csum_len != 0) {  in mptcp_do_dss_opt_meat()
1363 			csum = *(uint16_t *)(void *)(cp + dss_ack_rsp->mdss_copt.mdss_len - csum_len);  in mptcp_do_dss_opt_meat()
1382 			sizeof(struct mptcp_dss32_ack64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1393 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1403 			    csum_len));  in mptcp_do_dss_opt_meat()
1415 		    sizeof(struct mptcp_dss64_ack64_opt) + csum_len);  in mptcp_do_dss_opt_meat()
1424 		if (csum_len == 0) {  in mptcp_do_dss_opt_meat()
1434 			    csum_len));  in mptcp_do_dss_opt_meat()