reproduce:
        git checkout dabff11003f9aaf293bd8f907a62f3366bd5e65f
        b4 shazam https://lore.kernel.org/r/11253ead28024160aaf8abf5c234de6605cc93b5.1770046529.git.bcodding@hammerspace.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs