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Commit 5ee34129 authored by Todd Poynor's avatar Todd Poynor Committed by Dmitry Shmidt
Browse files

ANDROID: 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: default avatarNicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: default avatarTodd Poynor <toddpoynor@google.com>
parent 81863d60

arch/x86/include/asm/idle.h

+0 −7
Original line number Diff line number Diff line 
#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);

arch/x86/kernel/process.c

+2 −15
Original line number Diff line number Diff line
@@ -67,19 +67,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_tss); 


#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



/*
@@ -255,14 +242,14 @@ static inline void play_dead(void) 
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 */

include/linux/cpu.h

+7 −0
Original line number Diff line number Diff line
@@ -253,4 +253,11 @@ 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
@@ -1932,3 +1932,23 @@ 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);