reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add broonie-spi https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git
        git fetch broonie-spi for-next
        git checkout broonie-spi/for-next
        b4 shazam https://lore.kernel.org/r/20250210131826.220318-5-patrice.chotard@foss.st.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-21 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-21 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/clk/ drivers/media/platform/chips-media/ drivers/memory/ sound/firewire/ sound/soc/starfive/