reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git/commit/?id=787130d7bc49ec01604277a3480f42ba1557385e
        git remote add lee-leds https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git
        git fetch --no-tags lee-leds for-leds-next-next
        git checkout 787130d7bc49ec01604277a3480f42ba1557385e

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/leds/