reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/lunn/linux/commit/8aae31b5d95b83a200d406db1b9c0108e36eb5a4
        git remote add lunn https://github.com/lunn/linux.git
        git fetch --no-tags lunn v6.12.0-scu4-dt-overlay
        git checkout 8aae31b5d95b83a200d406db1b9c0108e36eb5a4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/