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Commit cc1fe215 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

cpu/hotplug: Split do_cpu_down() 



Split out the inner workings of do_cpu_down() to allow reuse of that
function for the upcoming SMT disabling mechanism.

No functional change.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
parent c4de6569

kernel/cpu.c

+8 −9
Original line number Diff line number Diff line
@@ -906,20 +906,19 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen, 
	return ret;

}



static int cpu_down_maps_locked(unsigned int cpu, enum cpuhp_state target)

{

	if (cpu_hotplug_disabled)

		return -EBUSY;

	return _cpu_down(cpu, 0, target);

}



static int do_cpu_down(unsigned int cpu, enum cpuhp_state target)

{

	int err;



	cpu_maps_update_begin();



	if (cpu_hotplug_disabled) {

		err = -EBUSY;

		goto out;

	}



	err = _cpu_down(cpu, 0, target);



out:

	err = cpu_down_maps_locked(cpu, target);

	cpu_maps_update_done();

	return err;

}