reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/ceph/ceph-client/commit/758e3b13187ab7e12eed0a51f51461c3f85a9fa5
        git remote add ceph-client https://github.com/ceph/ceph-client.git
        git fetch --no-tags ceph-client tls_logger
        git checkout 758e3b13187ab7e12eed0a51f51461c3f85a9fa5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky distclean