reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/gmonaco/linux.git/commit/?id=a3a107602a180742b0a05704b5c554f5ba056bf0
        git remote add glemco https://git.kernel.org/pub/scm/linux/kernel/git/gmonaco/linux.git
        git fetch --no-tags glemco staging_rv_mon_kunit
        git checkout a3a107602a180742b0a05704b5c554f5ba056bf0

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/trace/rv/