reproduce (this is a W=1 build):
        git checkout 7c3ba4249a3604477ea9c077e10089ba7ddcaa03
        b4 shazam https://lore.kernel.org/r/20251009-clk-ssc-v5-1-v5-4-d6447d76171e@nxp.com
        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=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/clk/