linux-kernel - Re: [PATCH v22 4/5] mm/pagemap: add documentation of PAGEMAP

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Date:   Tue, 4 Jul 2023 18:10:32 +0800
From:   kernel test robot <lkp@...el.com>
To:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Peter Xu <peterx@...hat.com>,
        David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michał Mirosław <emmir@...gle.com>,
        Andrei Vagin <avagin@...il.com>,
        Danylo Mocherniuk <mdanylo@...gle.com>,
        Paul Gofman <pgofman@...eweavers.com>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Mike Rapoport <rppt@...nel.org>, Nadav Amit <namit@...are.com>
Cc:     oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Christian Brauner <brauner@...nel.org>,
        Yang Shi <shy828301@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Liam R . Howlett" <Liam.Howlett@...cle.com>,
        Yun Zhou <yun.zhou@...driver.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Alex Sierra <alex.sierra@....com>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Matthew Wilcox <willy@...radead.org>,
        Pasha Tatashin <pasha.tatashin@...een.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        "Gustavo A . R . Silva" <gustavoars@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Greg KH <greg@...ah.com>
Subject: Re: [PATCH v22 4/5] mm/pagemap: add documentation of PAGEMAP_SCAN
 IOCTL

Hi Muhammad,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master next-20230704]
[cannot apply to v6.4]
[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/Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230628-180259
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230628095426.1886064-5-usama.anjum%40collabora.com
patch subject: [PATCH v22 4/5] mm/pagemap: add documentation of PAGEMAP_SCAN IOCTL
reproduce: (https://download.01.org/0day-ci/archive/20230704/202307041808.b1eQDDHa-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307041808.b1eQDDHa-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> Documentation/admin-guide/mm/pagemap.rst:238: WARNING: Unexpected indentation.
>> Documentation/admin-guide/mm/pagemap.rst:240: WARNING: Block quote ends without a blank line; unexpected unindent.

vim +238 Documentation/admin-guide/mm/pagemap.rst

   233	
   234	The ``PAGEMAP_SCAN`` IOCTL on the pagemap file can be used to get or optionally
   235	clear the info about page table entries. The following operations are supported
   236	in this IOCTL:
   237	- Get the information if the pages have been written to (``PAGE_IS_WRITTEN``),
 > 238	  file mapped (``PAGE_IS_FILE``), present (``PAGE_IS_PRESENT``), swapped
   239	  (``PAGE_IS_SWAPPED``) or page has pfn zero (``PAGE_IS_PFNZERO``).
 > 240	- Find pages which have been written to and/or write protect the pages atomically
   241	  (atomic ``PM_SCAN_OP_GET + PM_SCAN_OP_WP``)
   242	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki