The arm64 specific arch_register_cpu() needs to access the _STA method of the DSDT object so make it available by assigning the appropriate handle to the struct cpu instance. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> --- drivers/acpi/acpi_processor.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 7a0dd35d62c9..93e029403d05 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -235,6 +235,7 @@ static int acpi_processor_get_info(struct acpi_device *device) union acpi_object object = { 0 }; struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; struct acpi_processor *pr = acpi_driver_data(device); + struct cpu *c; int device_declaration = 0; acpi_status status = AE_OK; static int cpu0_initialized; @@ -314,6 +315,8 @@ static int acpi_processor_get_info(struct acpi_device *device) cpufreq_add_device("acpi-cpufreq"); } + c = &per_cpu(cpu_devices, pr->id); + ACPI_COMPANION_SET(&c->dev, device); /* * Extra Processor objects may be enumerated on MP systems with * less than the max # of CPUs. They should be ignored _iff -- 2.39.2