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://github.com/sean-jc/linux/commit/ad35ef8ce42f860d08d8f651d3cbafcede4f8275
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc x86/kvm_exports_for_kvm
        git checkout ad35ef8ce42f860d08d8f651d3cbafcede4f8275
        # 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 kernel/