--- zzzz-none-000/linux-3.18.24/include/linux/ppp_channel.h	2015-10-31 20:39:51.000000000 +0000
+++ rtl96-5690pro-762/linux-3.18.24/include/linux/ppp_channel.h	2024-08-14 08:36:37.000000000 +0000
@@ -34,6 +34,17 @@
 	int	(*ioctl)(struct ppp_channel *, unsigned int, unsigned long);
 };
 
+#if defined(CONFIG_RTL867X_IPTABLES_FAST_PATH)
+extern const struct ppp_channel_ops async_ops;
+extern const struct ppp_channel_ops pppoe_chan_ops;
+#ifdef CONFIG_PPTP
+extern const struct ppp_channel_ops pptp_chan_ops;
+#endif
+#ifdef CONFIG_PPPOL2TP
+extern const struct ppp_channel_ops pppol2tp_chan_ops;
+#endif
+#endif
+
 struct ppp_channel {
 	void		*private;	/* channel private data */
 	const struct ppp_channel_ops *ops; /* operations for this channel */