reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/b6e8471b174f2264b132157c6a5b58fd8935e1c9
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20260702-004403/K-Prateek-Nayak/x86-runtime-const-Introduce-runtime_const_mask_32/20260630-130124
        git checkout b6e8471b174f2264b132157c6a5b58fd8935e1c9

        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # clang-23 might not be officially released. Try a lower version if installation fails.
        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=$HOME/0day COMPILER=clang-23 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-23 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash