reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=640ae42efb828be69a9ee6ac88fb3d5a3e678ddf
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 640ae42efb828be69a9ee6ac88fb3d5a3e678ddf
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash ./ arch/x86/entry/ drivers/dma/xilinx/ drivers/gpu/drm/amd/amdgpu/ drivers/gpu/drm/radeon/ drivers/gpu/drm/scheduler/ drivers/gpu/drm/ttm/ drivers/md/ fs/gfs2/ kernel/ mm/ net/core/