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--- b/arch/x86/include/asm/idle.h
+++ a/arch/x86/include/asm/idle.h
@@ -1,6 +1,13 @@
#ifndef _ASM_X86_IDLE_H
#define _ASM_X86_IDLE_H
+#define IDLE_START 1
+#define IDLE_END 2
+
+struct notifier_block;
+void idle_notifier_register(struct notifier_block *n);
+void idle_notifier_unregister(struct notifier_block *n);
+
#ifdef CONFIG_X86_64
void enter_idle(void);
void exit_idle(void);
--- b/arch/x86/kernel/process.c
+++ a/arch/x86/kernel/process.c
@@ -68,6 +68,19 @@
#ifdef CONFIG_X86_64
static DEFINE_PER_CPU(unsigned char, is_idle);
+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);
#endif
/*
@@ -384,14 +397,14 @@
void enter_idle(void)
{
this_cpu_write(is_idle, 1);
+ atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
- idle_notifier_call_chain(IDLE_START);
}
static void __exit_idle(void)
{
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return;
+ atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
- idle_notifier_call_chain(IDLE_END);
}
/* Called from interrupts to signify idle end */
--- b/include/linux/cpu.h
+++ a/include/linux/cpu.h
@@ -276,11 +276,4 @@
static inline void cpu_smt_check_topology(void) { }
#endif
-#define IDLE_START 1
-#define IDLE_END 2
-
-void idle_notifier_register(struct notifier_block *n);
-void idle_notifier_unregister(struct notifier_block *n);
-void idle_notifier_call_chain(unsigned long val);
-
#endif /* _LINUX_CPU_H_ */
--- b/kernel/cpu.c
+++ a/kernel/cpu.c
@@ -2206,23 +2206,3 @@
#endif
this_cpu_write(cpuhp_state.state, CPUHP_ONLINE);
}
-
-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);
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