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ACPI: Add weak routines for ACPI CPU Hotplug

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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 cbfc1bae55 ("[ACPI] ACPI_HOTPLUG_CPU Kconfig dependency
update")

    prevent:

    HOTPLUG_CPU=y
    ACPI_PROCESSOR=y
    ACPI_HOTPLUG_CPU=n

Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ashwin Chaugule 2015-09-09 16:27:06 -04:00 committed by Rafael J. Wysocki
parent 5477fb3bd1
commit 56cdc2a05c
1 changed files with 18 additions and 0 deletions
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18
drivers/acpi/acpi_processor.c
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@ -164,6 +164,24 @@ static int acpi_processor_errata(void)
-------------------------------------------------------------------------- */
#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)
{
unsigned long long sta;