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Commit c2461bc0 authored by Amit Pundir's avatar Amit Pundir
Browse files

ANDROID: idle_notifier: Add generic idle notifiers 



AOSP Change-ID: Idf29cda15be151f494ff245933c12462643388d5
moved x86_64 idle notifiers as generic so that they can
be used in interactive governor.

Upstream change 8e7a7ee9 ("x86/idle: Remove idle_notifier")
removed x86_64 idle notifiers altogether. This patch add
generic idle notifiers again.

Fixes: android-4.9 commit bfd2a547fc17 ("ANDROID: ARM: Call idle notifiers")
Signed-off-by: default avatarAmit Pundir <amit.pundir@linaro.org>
parent 55ca9206

include/linux/cpu.h

+7 −0
Original line number Diff line number Diff line
@@ -166,4 +166,11 @@ void cpuhp_report_idle_dead(void); 
static inline void cpuhp_report_idle_dead(void) { }

#endif /* #ifdef CONFIG_HOTPLUG_CPU */



#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_ */

kernel/cpu.c

+20 −0
Original line number Diff line number Diff line
@@ -1788,3 +1788,23 @@ void __init boot_cpu_state_init(void) 
{

	per_cpu_ptr(&cpuhp_state, smp_processor_id())->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);