reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add lee-backlight https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git
        git fetch lee-backlight for-backlight-next
        git checkout lee-backlight/for-backlight-next
        b4 shazam https://lore.kernel.org/r/20230701120806.11812-2-julius@zint.sh
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/video/backlight/