static void acpi_processor_remove(struct acpi_device *device) { struct acpi_processor *pr; if (!device || !acpi_driver_data(device)) return; pr = acpi_driver_data(device); if (pr->id >= nr_cpu_ids) goto out; /* * The only reason why we ever get here is CPU hot-removal. The CPU is * already offline and the ACPI device removal locking prevents it from * being put back online at this point. * * Unbind the driver from the processor device and detach it from the * ACPI companion object. */ device_release_driver(pr->dev); acpi_unbind_one(pr->dev); /* Clean up. */ per_cpu(processor_device_array, pr->id) = NULL; per_cpu(processors, pr->id) = NULL; cpu_maps_update_begin(); cpu_hotplug_begin(); /* Remove the CPU. */ arch_unregister_cpu(pr->id); acpi_unmap_lsapic(pr->id); cpu_hotplug_done(); cpu_maps_update_done(); try_offline_node(cpu_to_node(pr->id)); out: free_cpumask_var(pr->throttling.shared_cpu_map); kfree(pr); }
static int acpi_processor_remove(struct acpi_device *device) { struct acpi_processor *pr = NULL; if (!device || !acpi_driver_data(device)) return -EINVAL; pr = acpi_driver_data(device); if (pr->id >= nr_cpu_ids) goto free; if (device->removal_type == ACPI_BUS_REMOVAL_EJECT) { if (acpi_processor_handle_eject(pr)) return -EINVAL; } acpi_processor_power_exit(pr); sysfs_remove_link(&device->dev.kobj, "sysdev"); if (pr->cdev) { sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); sysfs_remove_link(&pr->cdev->device.kobj, "device"); thermal_cooling_device_unregister(pr->cdev); pr->cdev = NULL; } per_cpu(processors, pr->id) = NULL; per_cpu(processor_device_array, pr->id) = NULL; try_offline_node(cpu_to_node(pr->id)); free: free_cpumask_var(pr->throttling.shared_cpu_map); kfree(pr); return 0; }