reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/snitzer/linux.git/commit/?id=1c47b11aea49b86fa76214ea0becb24715da5ceb
        git remote add snitzer https://git.kernel.org/pub/scm/linux/kernel/git/snitzer/linux.git
        git fetch --no-tags snitzer kernel-7.3/trond-nfs-next
        git checkout 1c47b11aea49b86fa76214ea0becb24715da5ceb
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs