mptcp_userspace_pm_append_new_local_addr() has always exclusively been
used in pm_userspace.c since its introduction in
commit 
4638de5aefe5 ("mptcp: handle local addrs announced by userspace PMs").
So make it static.
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
 
        }
 }
 
-int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
-                                            struct mptcp_pm_addr_entry *entry)
+static int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
+                                                   struct mptcp_pm_addr_entry *entry)
 {
        DECLARE_BITMAP(id_bitmap, MPTCP_PM_MAX_ADDR_ID + 1);
        struct mptcp_pm_addr_entry *match = NULL;
 
 void mptcp_pm_remove_addrs_and_subflows(struct mptcp_sock *msk,
                                        struct list_head *rm_list);
 
-int mptcp_userspace_pm_append_new_local_addr(struct mptcp_sock *msk,
-                                            struct mptcp_pm_addr_entry *entry);
 void mptcp_free_local_addr_list(struct mptcp_sock *msk);
 int mptcp_nl_cmd_announce(struct sk_buff *skb, struct genl_info *info);
 int mptcp_nl_cmd_remove(struct sk_buff *skb, struct genl_info *info);