Hi Ming, I love your patch! Perhaps something to improve: [auto build test WARNING on axboe-block/for-next] [also build test WARNING on lwn-2.6/docs-next linus/master v6.0-rc2 next-20220826] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Ming-Lei/Docs-ublk-add-ublk-document/20220828-125214 base: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next reproduce: # https://github.com/intel-lab-lkp/linux/commit/4cd40d237bac08efb23668766ba39b36a0b1632a git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Ming-Lei/Docs-ublk-add-ublk-document/20220828-125214 git checkout 4cd40d237bac08efb23668766ba39b36a0b1632a make menuconfig # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS make htmldocs If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> Documentation/block/ublk.rst: WARNING: document isn't included in any toctree -- 0-DAY CI Kernel Test Service https://01.org/lkp