Re: [PATCH v2] ACPI: processor: idle: Fix resource leak and potential concurrent in acpi_processor_power_init()

[kernel test robot <lkp@intel.com>]

Hi Huisong,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/bleeding-edge linus/master v6.16-rc7 next-20250723]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Huisong-Li/ACPI-processor-idle-Fix-resource-leak-and-potential-concurrent-in-acpi_processor_power_init/20250723-201246
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20250723121034.3685996-1-lihuisong%40huawei.com
patch subject: [PATCH v2] ACPI: processor: idle: Fix resource leak and potential concurrent in acpi_processor_power_init()
config: i386-buildonly-randconfig-001-20250724 (https://download.01.org/0day-ci/archive/20250724/202507240807.1ild86sv-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250724/202507240807.1ild86sv-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507240807.1ild86sv-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/acpi/processor_core.c:15:
>> include/acpi/processor.h:452:13: warning: 'acpi_processor_unregister_idle_driver' defined but not used [-Wunused-function]
     452 | static void acpi_processor_unregister_idle_driver(void)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/acpi/processor.h:448:12: warning: 'acpi_processor_register_idle_driver' defined but not used [-Wunused-function]
     448 | static int acpi_processor_register_idle_driver(void)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/acpi_processor_unregister_idle_driver +452 include/acpi/processor.h

   443	
   444	static inline int acpi_processor_hotplug(struct acpi_processor *pr)
   445	{
   446		return -ENODEV;
   447	}
 > 448	static int acpi_processor_register_idle_driver(void)
   449	{
   450		return -ENODEV;
   451	}
 > 452	static void acpi_processor_unregister_idle_driver(void)
   453	{
   454	}
   455	#endif /* CONFIG_ACPI_PROCESSOR_IDLE */
   456	

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