reproduce (this is a W=1 build):
        git checkout 7be4bc52fd9e0e55dc9a2e0232b89427d2c4b614
        b4 shazam https://lore.kernel.org/r/58e3baebbf4e454725e6bde8b7a267fb71cfdaae.1793017074.git.liuyun01@kylinos.cn

        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=$HOME/0day COMPILER=gcc-15.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.3.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash