reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add lee-leds https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git
        git fetch lee-leds for-leds-next
        git checkout lee-leds/for-leds-next
        b4 shazam https://lore.kernel.org/r/1728464547-31722-1-git-send-email-michal.vokac@ysoft.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=xtensa olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=xtensa SHELL=/bin/bash drivers/leds/