reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/masneyb/linux/commit/eea9100f42b58ca73af101e3b582f49be56eb679
        git remote add masneyb https://github.com/masneyb/linux
        git fetch --no-tags masneyb clk-remove-round-rate
        git checkout eea9100f42b58ca73af101e3b582f49be56eb679
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/net/ethernet/cadence/