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Commit 56cdc2a0 authored by Ashwin Chaugule's avatar Ashwin Chaugule Committed by Rafael J. Wysocki
Browse files

ACPI: Add weak routines for ACPI CPU Hotplug 



Add weak functions for architectures which do not support
hot-adding and removing CPUs which aren't detected at
bootup. (e.g. via MADT).

This helps preserve the Kconfig dependency from:

commit cbfc1bae ("[ACPI] ACPI_HOTPLUG_CPU Kconfig dependency
update")

    prevent:

    HOTPLUG_CPU=y
    ACPI_PROCESSOR=y
    ACPI_HOTPLUG_CPU=n

Signed-off-by: default avatarAshwin Chaugule <ashwin.chaugule@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 5477fb3b

drivers/acpi/acpi_processor.c

+18 −0
Original line number Original line Diff line number Diff line
@@ -164,6 +164,24 @@ static int acpi_processor_errata(void) 
   -------------------------------------------------------------------------- */

   -------------------------------------------------------------------------- */





#ifdef CONFIG_ACPI_HOTPLUG_CPU

#ifdef CONFIG_ACPI_HOTPLUG_CPU

int __weak acpi_map_cpu(acpi_handle handle,

		phys_cpuid_t physid, int *pcpu)

{

	return -ENODEV;

}



int __weak acpi_unmap_cpu(int cpu)

{

	return -ENODEV;

}



int __weak arch_register_cpu(int cpu)

{

	return -ENODEV;

}



void __weak arch_unregister_cpu(int cpu) {}



static int acpi_processor_hotadd_init(struct acpi_processor *pr)

static int acpi_processor_hotadd_init(struct acpi_processor *pr)

{

{

	unsigned long long sta;

	unsigned long long sta;