884 				      const struct mptcp_ext *mpext)  in mptcp_skb_can_collapse_to()  argument
892 	return mpext && mpext->data_seq + mpext->data_len == write_seq &&  in mptcp_skb_can_collapse_to()
893 	       !mpext->frozen;  in mptcp_skb_can_collapse_to()
1207 	struct skb_ext *mpext = __skb_ext_alloc(gfp);  in __mptcp_add_ext()  local
1209 	if (!mpext)  in __mptcp_add_ext()
1211 	__skb_ext_set(skb, SKB_EXT_MPTCP, mpext);  in __mptcp_add_ext()
1275 	struct mptcp_ext *mpext = mptcp_get_ext(skb);  in mptcp_update_data_checksum()  local
1276 	__wsum csum = ~csum_unfold(mpext->csum);  in mptcp_update_data_checksum()
1279 	mpext->csum = csum_fold(csum_block_add(csum, skb_checksum(skb, offset, added, 0), offset));  in mptcp_update_data_checksum()
1289 	struct mptcp_ext *mpext = NULL;  in mptcp_sendmsg_frag()  local
1310 		mpext = skb_ext_find(skb, SKB_EXT_MPTCP);  in mptcp_sendmsg_frag()
1311 		if (!mptcp_skb_can_collapse_to(data_seq, skb, mpext)) {  in mptcp_sendmsg_frag()
1357 		mpext->data_len += ret;  in mptcp_sendmsg_frag()
1362 	mpext = skb_ext_find(tail, SKB_EXT_MPTCP);  in mptcp_sendmsg_frag()
1363 	if (WARN_ON_ONCE(!mpext)) {  in mptcp_sendmsg_frag()
1368 	memset(mpext, 0, sizeof(*mpext));  in mptcp_sendmsg_frag()
1369 	mpext->data_seq = data_seq;  in mptcp_sendmsg_frag()
1370 	mpext->subflow_seq = mptcp_subflow_ctx(ssk)->rel_write_seq;  in mptcp_sendmsg_frag()
1371 	mpext->data_len = ret;  in mptcp_sendmsg_frag()
1372 	mpext->use_map = 1;  in mptcp_sendmsg_frag()
1373 	mpext->dsn64 = 1;  in mptcp_sendmsg_frag()
1376 		 mpext->data_seq, mpext->subflow_seq, mpext->data_len,  in mptcp_sendmsg_frag()
1377 		 mpext->dsn64);  in mptcp_sendmsg_frag()
1381 		mpext->frozen = 1;  in mptcp_sendmsg_frag()