--- zzzz-none-000/linux-4.9.218/include/linux/ppp_channel.h	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/include/linux/ppp_channel.h	2023-03-29 10:59:07.000000000 +0000
@@ -75,6 +75,9 @@
 /* Get the device name associated with a channel, or NULL if none */
 extern char *ppp_dev_name(struct ppp_channel *);
 
+/* Get the device pointer associated with a channel, or NULL if none */
+extern struct net_device *ppp_device(struct ppp_channel *);
+
 /*
  * SMP locking notes:
  * The channel code must ensure that when it calls ppp_unregister_channel,