static int __init pseries_energy_init(void)
{
int cpu, err;
- struct device *cpu_dev;
+ struct device *cpu_dev, *dev_root;
if (!firmware_has_feature(FW_FEATURE_BEST_ENERGY))
return 0; /* H_BEST_ENERGY hcall not supported */
/* Create the sysfs files */
- err = device_create_file(cpu_subsys.dev_root,
- &attr_cpu_activate_hint_list);
- if (!err)
- err = device_create_file(cpu_subsys.dev_root,
- &attr_cpu_deactivate_hint_list);
+ dev_root = bus_get_dev_root(&cpu_subsys);
+ if (dev_root) {
+ err = device_create_file(dev_root, &attr_cpu_activate_hint_list);
+ if (!err)
+ err = device_create_file(dev_root, &attr_cpu_deactivate_hint_list);
+ put_device(dev_root);
+ if (err)
+ return err;
+ }
- if (err)
- return err;
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
err = device_create_file(cpu_dev,
static void __exit pseries_energy_cleanup(void)
{
int cpu;
- struct device *cpu_dev;
+ struct device *cpu_dev, *dev_root;
if (!sysfs_entries)
return;
/* Remove the sysfs files */
- device_remove_file(cpu_subsys.dev_root, &attr_cpu_activate_hint_list);
- device_remove_file(cpu_subsys.dev_root, &attr_cpu_deactivate_hint_list);
+ dev_root = bus_get_dev_root(&cpu_subsys);
+ if (dev_root) {
+ device_remove_file(dev_root, &attr_cpu_activate_hint_list);
+ device_remove_file(dev_root, &attr_cpu_deactivate_hint_list);
+ put_device(dev_root);
+ }
for_each_possible_cpu(cpu) {
cpu_dev = get_cpu_device(cpu);
**/
static int pseries_suspend_sysfs_register(struct device *dev)
{
+ struct device *dev_root;
int rc;
if ((rc = subsys_system_register(&suspend_subsys, NULL)))
dev->id = 0;
dev->bus = &suspend_subsys;
- if ((rc = device_create_file(suspend_subsys.dev_root, &dev_attr_hibernate)))
- goto subsys_unregister;
+ dev_root = bus_get_dev_root(&suspend_subsys);
+ if (dev_root) {
+ rc = device_create_file(dev_root, &dev_attr_hibernate);
+ put_device(dev_root);
+ if (rc)
+ goto subsys_unregister;
+ }
return 0;