reproduce (this is a W=1 build):
        git checkout f3aeab61fb15edef1e81828da8dbf0814541e49b
        b4 shazam https://lore.kernel.org/r/20230818-vfs-super-fixes-v3-v2-4-cdab45934983@kernel.org
        # 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