--- zzzz-none-000/linux-4.4.271/include/net/addrconf.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/addrconf.h	2023-04-19 10:22:30.000000000 +0000
@@ -45,7 +45,7 @@
 	__be32			reserved2;
 
 	struct in6_addr		prefix;
-};
+} __attribute__((packed, aligned(2)));
 
 
 #include <linux/netdevice.h>
@@ -391,6 +391,9 @@
 #endif
 }
 
+struct net_device *ipv6_dev_find(struct net *net, struct in6_addr *addr,
+				 int strict);
+
 #ifdef CONFIG_PROC_FS
 int if6_proc_init(void);
 void if6_proc_exit(void);