mptcp_lookup_subflow_by_saddr
remove_subflow = mptcp_lookup_subflow_by_saddr(&msk->conn_list, addr);
mptcp_lookup_subflow_by_saddr(&msk->conn_list, &entry->addr))
else if (!mptcp_lookup_subflow_by_saddr(&msk->conn_list, &entry->addr))
bool mptcp_lookup_subflow_by_saddr(const struct list_head *list,