reproduce (this is a W=1 build):
        # https://github.com/morimoto/linux/commit/97361c66c826ea94c2924afa0b31d41886d844b9
        git remote add morimoto https://github.com/morimoto/linux
        git fetch --no-tags morimoto renesas-lts/v6.18-rc5-2025-11-10-sparrow-hawk
        git checkout 97361c66c826ea94c2924afa0b31d41886d844b9

        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/media/platform/dreamchip/rppx1/ mm/