reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=216e3cd2f28dbbf1fe86848e0e29e6693b9f0a20
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 216e3cd2f28dbbf1fe86848e0e29e6693b9f0a20
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/android/ drivers/char/ drivers/dma/ drivers/firmware/efi/libstub/ drivers/gpu/drm/ drivers/net/usb/ drivers/ntb/ drivers/rapidio/ drivers/remoteproc/ drivers/staging/ drivers/usb/dwc2/ drivers/usb/musb/ dtbs fs/ kernel/ net/ security/