reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://github.com/esmil/linux/commit/d877fe698cc67af36c4281e018700c7c341efbf2
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil eic7700
        git checkout d877fe698cc67af36c4281e018700c7c341efbf2
        # save the config file
        ~/lkp-tests/kbuild/make.cross W=1 ARCH=riscv olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 ARCH=riscv