reproduce:
        git checkout 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b
        b4 shazam https://lore.kernel.org/r/20241008104035.4008-9-dheerajkumar.srivastava@amd.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # install Sphinx 2.4.4
        make htmldocs