[PATCH v7 1/5] leds: flash: Add flash registration with undefined CONFIG_LEDS_CLASS_FLASH

[kernel test robot]

Hi Gene,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on pavel-linux-leds/for-next]
[also build test WARNING on robh/for-next linus/master v5.10-rc4 next-20201118]
[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]

url:    https://github.com/0day-ci/linux/commits/Gene-Chen/leds-mt6360-Add-LED-driver-for-MT6360/20201118-185208
base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
config: nds32-randconfig-r001-20201118 (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/a088d9624f18b888ede6b0344163b8464db82f3b
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Gene-Chen/leds-mt6360-Add-LED-driver-for-MT6360/20201118-185208
        git checkout a088d9624f18b888ede6b0344163b8464db82f3b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nds32 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/staging/greybus/light.c:11:
>> include/linux/led-class-flash.h:160:6: warning: no previous prototype for 'devm_led_classdev_flash_unregister' [-Wmissing-prototypes]
     160 | void devm_led_classdev_flash_unregister(struct device *parent,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/devm_led_classdev_flash_unregister +160 include/linux/led-class-flash.h

   159	
 > 160	void devm_led_classdev_flash_unregister(struct device *parent,
   161						struct led_classdev_flash *fled_cdev)
   162	{};
   163	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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