reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git/commit/?id=11e898373fba6b1d27b15ab4beff592701a57293
        git remote add daeinki-drm-exynos https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git
        git fetch --no-tags daeinki-drm-exynos exynos-drm-next
        git checkout 11e898373fba6b1d27b15ab4beff592701a57293

        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=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/exynos/