reproduce (this is a W=1 build):
        git checkout 70478cb9da6fc4e7b987219173ba1681d5f7dd3d
        b4 shazam https://lore.kernel.org/r/20251010011951.2136980-6-surenb@google.com
        # install loongarch cross compiling tool for clang build
        # apt-get install binutils-loongarch-linux-gnu
        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=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash drivers/gpu/drm/ttm/tests/ drivers/irqchip/ mm/tests/ sound/soc/starfive/