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Commit a08adc98 authored by qctecmdr Service's avatar qctecmdr Service Committed by Gerrit - the friendly Code Review server
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Merge "arm64: Call idle notifiers in CPU idle"

parents b0d26bf6 e5414a42

arch/arm64/kernel/process.c

+10 −0
Original line number Diff line number Diff line
@@ -88,6 +88,16 @@ void arch_cpu_idle(void) 
	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());

}



void arch_cpu_idle_enter(void)

{

	idle_notifier_call_chain(IDLE_START);

}



void arch_cpu_idle_exit(void)

{

	idle_notifier_call_chain(IDLE_END);

}



#ifdef CONFIG_HOTPLUG_CPU

void arch_cpu_idle_dead(void)

{

include/linux/cpu.h

+7 −0
Original line number Diff line number Diff line
@@ -189,4 +189,11 @@ static inline void cpu_smt_check_topology_early(void) { } 
static inline void cpu_smt_check_topology(void) { }

#endif



#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
@@ -2291,3 +2291,23 @@ void __init boot_cpu_hotplug_init(void) 
#endif

	this_cpu_write(cpuhp_state.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);