--- zzzz-none-000/linux-4.4.60/include/linux/vmstat.h	2017-04-08 07:53:53.000000000 +0000
+++ jet-2400-727/linux-4.4.60/include/linux/vmstat.h	2021-03-17 14:36:41.000000000 +0000
@@ -53,6 +53,10 @@
 
 extern void all_vm_events(unsigned long *);
 
+#if defined(CONFIG_AVM_POWERMETER)
+extern void __all_vm_events(unsigned long *ret);
+#endif/*--- #if defined(CONFIG_AVM_POWERMETER) ---*/
+
 extern void vm_events_fold_cpu(int cpu);
 
 #else