reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/jlelli/linux/commit/803ce6cb1575a67e9d69fa158bfa7c747162f03c
        git remote add jlelli https://github.com/jlelli/linux.git
        git fetch --no-tags jlelli test/futex-local-hash-rfc-v3-stats
        git checkout 803ce6cb1575a67e9d69fa158bfa7c747162f03c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-14.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash kernel/futex/