Hi Jianhua, I love your 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 lee-leds/for-leds-next pavel-leds/for-next linus/master v6.2-rc4 next-20230119] [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/20230118-214354 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git for-backlight-next patch link: https://lore.kernel.org/r/20230118131002.15453-2-lujianhua000%40gmail.com patch subject: [PATCH v6 2/2] backlight: ktz8866: Add support for Kinetic KTZ8866 backlight config: parisc-randconfig-r031-20230119 (https://download.01.org/0day-ci/archive/20230120/202301200239.m4ZDprWz-lkp@xxxxxxxxx/config) compiler: hppa-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/b862510e8bf9eb34db9d71a372b9de05682cb8ad 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/20230118-214354 git checkout b862510e8bf9eb34db9d71a372b9de05682cb8ad # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=parisc olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=parisc SHELL=/bin/bash drivers/video/backlight/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/bits.h:6, from include/linux/ratelimit_types.h:5, from include/linux/ratelimit.h:5, from include/linux/dev_printk.h:16, from include/linux/device.h:15, from include/linux/backlight.h:12, from drivers/video/backlight/ktz8866.c:8: include/vdso/bits.h: In function 'ktz8866_init': >> include/vdso/bits.h:7:40: warning: 'val' is used uninitialized [-Wuninitialized] 7 | #define BIT(nr) (UL(1) << (nr)) | ^~ drivers/video/backlight/ktz8866.c:98:22: note: 'val' was declared here 98 | unsigned int val; | ^~~ vim +/val +7 include/vdso/bits.h 3945ff37d2f48d Vincenzo Frascino 2020-03-20 6 3945ff37d2f48d Vincenzo Frascino 2020-03-20 @7 #define BIT(nr) (UL(1) << (nr)) 3945ff37d2f48d Vincenzo Frascino 2020-03-20 8 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
