reproduce:
        git checkout c824345288d11e269ce41b36c105715bc2286050
        b4 shazam https://lore.kernel.org/r/20260213-b4-add_sc7280_mbr-v1-1-e8d95b4e4809@oss.qualcomm.com
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        # pip install -r Documentation/sphinx/requirements.txt
        make htmldocs