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x86/idle: Remove idle_notifier

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

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/f15385a82ec4bf51f4f06777193d83f03b28cfdd.1479449716.git.len.brown@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Len Brown 2016-11-18 01:23:18 -05:00 committed by Thomas Gleixner
parent b65ce83f2a
commit 8e7a7ee9dd
2 changed files with 0 additions and 22 deletions
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7
arch/x86/include/asm/idle.h
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@ -1,13 +1,6 @@
#ifndef _ASM_X86_IDLE_H #ifndef _ASM_X86_IDLE_H
#define _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 #ifdef CONFIG_X86_64
void enter_idle(void); void enter_idle(void);
void exit_idle(void); void exit_idle(void);

15
arch/x86/kernel/process.c
View File

@ -67,19 +67,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_tss);
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
static DEFINE_PER_CPU(unsigned char, is_idle); 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 #endif
/* /*
@ -255,14 +242,12 @@ static inline void play_dead(void)
void enter_idle(void) void enter_idle(void)
{ {
this_cpu_write(is_idle, 1); this_cpu_write(is_idle, 1);
atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL);
} }
static void __exit_idle(void) static void __exit_idle(void)
{ {
if (x86_test_and_clear_bit_percpu(0, is_idle) == 0) if (x86_test_and_clear_bit_percpu(0, is_idle) == 0)
return; return;
atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL);
} }
/* Called from interrupts to signify idle end */ /* Called from interrupts to signify idle end */