--- zzzz-none-000/linux-4.1.52/kernel/cpu.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/kernel/cpu.c	2022-03-02 11:37:13.000000000 +0000
@@ -823,3 +823,25 @@
 {
 	cpumask_copy(to_cpumask(cpu_online_bits), src);
 }
+
+#if defined CONFIG_BCM_KF_INTERACTIVE && defined CONFIG_CPU_FREQ_GOV_INTERACTIVE
+static ATOMIC_NOTIFIER_HEAD(idle_notifier);
+
+void idle_notifier_register(struct notifier_block *n)
+{
+	atomic_notifier_chain_register(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_register);
+
+void idle_notifier_unregister(struct notifier_block *n)
+{
+	atomic_notifier_chain_unregister(&idle_notifier, n);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_unregister);
+
+void idle_notifier_call_chain(unsigned long val)
+{
+	atomic_notifier_call_chain(&idle_notifier, val, NULL);
+}
+EXPORT_SYMBOL_GPL(idle_notifier_call_chain);
+#endif