Hi Thomas, kernel test robot noticed the following build errors: [auto build test ERROR on lee-backlight/for-backlight-next] [also build test ERROR on linus/master v6.14-rc5 next-20250307] [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/Thomas-Zimmermann/fbdev-Rework-fb_blank/20250306-221554 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git for-backlight-next patch link: https://lore.kernel.org/r/20250306140947.580324-7-tzimmermann%40suse.de patch subject: [PATCH v3 06/11] backlight: Replace fb events with a dedicated function call config: x86_64-randconfig-005-20250308 (https://download.01.org/0day-ci/archive/20250308/202503081939.UtJzrbfX-lkp@xxxxxxxxx/config) compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250308/202503081939.UtJzrbfX-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/202503081939.UtJzrbfX-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: backlight_notify_blank >>> referenced by fb_backlight.c:47 (drivers/video/fbdev/core/fb_backlight.c:47) >>> drivers/video/fbdev/core/fb_backlight.o:(fb_bl_notify_blank) in archive vmlinux.a -- >> ld.lld: error: undefined symbol: backlight_notify_blank_all >>> referenced by fb_backlight.c:49 (drivers/video/fbdev/core/fb_backlight.c:49) >>> drivers/video/fbdev/core/fb_backlight.o:(fb_bl_notify_blank) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
