--- zzzz-none-000/linux-2.6.39.4/include/linux/if_vlan.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/include/linux/if_vlan.h	2021-11-10 13:23:10.000000000 +0000
@@ -412,4 +412,11 @@
 	short vlan_qos;   
 };
 
+#ifndef __KERNEL__
+#include <stdint.h>
+#endif
+
+#define AVM_REGISTER_VLAN_DEVICE
+int avm_register_vlan_device(struct net_device *real_dev, uint16_t vlan_id, const char *name, struct net_device **vlan_dev);
+
 #endif /* !(_LINUX_IF_VLAN_H_) */