Move x86_64 idle notifiers to generic
Move the x86_64 idle notifiers originally by Andi Kleen and Venkatesh Pallipadi to generic. Change-Id: Idf29cda15be151f494ff245933c12462643388d5 Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Todd Poynor <toddpoynor@google.com>wifi-calibration
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@ -1,13 +1,6 @@
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#ifndef _ASM_X86_IDLE_H
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#define _ASM_X86_IDLE_H
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#define IDLE_START 1
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#define IDLE_END 2
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struct notifier_block;
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void idle_notifier_register(struct notifier_block *n);
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void idle_notifier_unregister(struct notifier_block *n);
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#ifdef CONFIG_X86_64
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void enter_idle(void);
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void exit_idle(void);
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@ -61,19 +61,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_tss);
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#ifdef CONFIG_X86_64
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static DEFINE_PER_CPU(unsigned char, is_idle);
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static ATOMIC_NOTIFIER_HEAD(idle_notifier);
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void idle_notifier_register(struct notifier_block *n)
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{
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atomic_notifier_chain_register(&idle_notifier, n);
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}
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EXPORT_SYMBOL_GPL(idle_notifier_register);
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void idle_notifier_unregister(struct notifier_block *n)
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{
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atomic_notifier_chain_unregister(&idle_notifier, n);
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}
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EXPORT_SYMBOL_GPL(idle_notifier_unregister);
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#endif
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struct kmem_cache *task_xstate_cachep;
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@ -288,14 +275,14 @@ static inline void play_dead(void)
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void enter_idle(void)
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{
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this_cpu_write(is_idle, 1);
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atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
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idle_notifier_call_chain(IDLE_START);
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}
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static void __exit_idle(void)
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{
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if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
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return;
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atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
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idle_notifier_call_chain(IDLE_END);
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}
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/* Called from interrupts to signify idle end */
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@ -291,4 +291,11 @@ bool cpu_wait_death(unsigned int cpu, int seconds);
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bool cpu_report_death(void);
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#endif /* #ifdef CONFIG_HOTPLUG_CPU */
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#define IDLE_START 1
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#define IDLE_END 2
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void idle_notifier_register(struct notifier_block *n);
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void idle_notifier_unregister(struct notifier_block *n);
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void idle_notifier_call_chain(unsigned long val);
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#endif /* _LINUX_CPU_H_ */
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20
kernel/cpu.c
20
kernel/cpu.c
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@ -823,3 +823,23 @@ void init_cpu_online(const struct cpumask *src)
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{
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cpumask_copy(to_cpumask(cpu_online_bits), src);
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}
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static ATOMIC_NOTIFIER_HEAD(idle_notifier);
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void idle_notifier_register(struct notifier_block *n)
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{
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atomic_notifier_chain_register(&idle_notifier, n);
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}
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EXPORT_SYMBOL_GPL(idle_notifier_register);
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void idle_notifier_unregister(struct notifier_block *n)
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{
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atomic_notifier_chain_unregister(&idle_notifier, n);
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}
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EXPORT_SYMBOL_GPL(idle_notifier_unregister);
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void idle_notifier_call_chain(unsigned long val)
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{
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atomic_notifier_call_chain(&idle_notifier, val, NULL);
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}
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EXPORT_SYMBOL_GPL(idle_notifier_call_chain);
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