reproduce (this is a W=1 build):
        # https://github.com/litex-hub/linux/commit/961531e39f7b771063d80a065273675dc90fbcd2
        git remote add litex-hub https://github.com/litex-hub/linux
        git fetch --no-tags litex-hub litex-rebase
        git checkout 961531e39f7b771063d80a065273675dc90fbcd2

        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=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash dt_binding_check dtbs_check