linux-kernel - Re: [PATCH 1/2] backlight: ktz8866: Add support for Kinetic KTZ8866 backlight

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Message-ID: <202212212003.AKZfuD6v-lkp@intel.com>
Date:   Wed, 21 Dec 2022 20:06:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jianhua Lu <lujianhua000@...il.com>, Lee Jones <lee@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>, Helge Deller <deller@....de>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        Jianhua Lu <lujianhua000@...il.com>
Subject: Re: [PATCH 1/2] backlight: ktz8866: Add support for Kinetic KTZ8866
 backlight

Hi Jianhua,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on lee-backlight/for-backlight-next]
[also build test WARNING on lee-backlight/for-backlight-fixes linus/master v6.1 next-20221220]
[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/Jianhua-Lu/backlight-ktz8866-Add-support-for-Kinetic-KTZ8866-backlight/20221221-150415
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git for-backlight-next
patch link:    https://lore.kernel.org/r/20221221065807.15998-1-lujianhua000%40gmail.com
patch subject: [PATCH 1/2] backlight: ktz8866: Add support for Kinetic KTZ8866 backlight
config: m68k-allyesconfig
compiler: m68k-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/37bc72c0b3350ba7636a19edb6db43534b01ab7c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jianhua-Lu/backlight-ktz8866-Add-support-for-Kinetic-KTZ8866-backlight/20221221-150415
        git checkout 37bc72c0b3350ba7636a19edb6db43534b01ab7c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/video/backlight/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/video/backlight/ktz8866.c:42:5: warning: no previous prototype for 'ktz8866_write' [-Wmissing-prototypes]
      42 | int ktz8866_write(struct ktz8866 *ktz, unsigned int reg, unsigned int val)
         |     ^~~~~~~~~~~~~


vim +/ktz8866_write +42 drivers/video/backlight/ktz8866.c

    41	
  > 42	int ktz8866_write(struct ktz8866 *ktz, unsigned int reg, unsigned int val)
    43	{
    44		return regmap_write(ktz->regmap, reg, val);
    45	}
    46	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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