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Commit 8e7a7ee9 authored by Len Brown's avatar Len Brown Committed by Thomas Gleixner
Browse files

x86/idle: Remove idle_notifier 



Upon removal of the i7300_idle driver, the idle_notifer is unused.

Signed-off-by: default avatarLen Brown <len.brown@intel.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/f15385a82ec4bf51f4f06777193d83f03b28cfdd.1479449716.git.len.brown@intel.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent b65ce83f

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

+0 −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 +242,12 @@ 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);

}



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);

}



/* Called from interrupts to signify idle end */