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/mripard/linux.git/commit/?id=d47482da8db871014f98b72967240cc79c0a6377
        git remote add mripard https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux.git
        git fetch --no-tags mripard drm/tidss/field-api
        git checkout d47482da8db871014f98b72967240cc79c0a6377
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-8.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash drivers/gpu/drm/tidss/