Re: [PATCH v1] mfd: core: Support auxiliary device

[kernel test robot]

Hi Raag,

kernel test robot noticed the following build errors:

[auto build test ERROR on driver-core/driver-core-testing]
[also build test ERROR on driver-core/driver-core-next driver-core/driver-core-linus lee-mfd/for-mfd-next lee-leds/for-leds-next linus/master v6.14 next-20250403]
[cannot apply to lee-mfd/for-mfd-fixes]
[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/Raag-Jadav/mfd-core-Support-auxiliary-device/20250403-190322
base:   driver-core/driver-core-testing
patch link:    https://lore.kernel.org/r/20250403110053.1274521-1-raag.jadav%40intel.com
patch subject: [PATCH v1] mfd: core: Support auxiliary device
config: csky-randconfig-001-20250403 (https://download.01.org/0day-ci/archive/20250403/202504032243.j5qqE6VB-lkp@xxxxxxxxx/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250403/202504032243.j5qqE6VB-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504032243.j5qqE6VB-lkp@xxxxxxxxx/

All error/warnings (new ones prefixed by >>):

   In file included from drivers/base/auxiliary_sysfs.c:6:
   include/linux/auxiliary_bus.h: In function 'auxiliary_device_uninit':
>> include/linux/auxiliary_bus.h:246:17: error: implicit declaration of function 'kfree' [-Wimplicit-function-declaration]
     246 |                 kfree(auxdev->resource);
         |                 ^~~~~
   In file included from drivers/base/auxiliary_sysfs.c:7:
   include/linux/slab.h: At top level:
>> include/linux/slab.h:472:6: warning: conflicting types for 'kfree'; have 'void(const void *)'
     472 | void kfree(const void *objp);
         |      ^~~~~
   include/linux/auxiliary_bus.h:246:17: note: previous implicit declaration of 'kfree' with type 'void(const void *)'
     246 |                 kfree(auxdev->resource);
         |                 ^~~~~


vim +/kfree +246 include/linux/auxiliary_bus.h

   242	
   243	static inline void auxiliary_device_uninit(struct auxiliary_device *auxdev)
   244	{
   245		if (auxdev->resource)
 > 246			kfree(auxdev->resource);
   247	
   248		mutex_destroy(&auxdev->sysfs.lock);
   249		put_device(&auxdev->dev);
   250	}
   251	

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