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Message-ID: <202408162012.cL9pnFSm-lkp@intel.com>
Date: Fri, 16 Aug 2024 20:54:51 +0800
From: kernel test robot <lkp@...el.com>
To: Huan Yang <link@...o.com>, Gerd Hoffmann <kraxel@...hat.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
Christian König <christian.koenig@....com>,
dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, opensource.kernel@...o.com,
Huan Yang <link@...o.com>
Subject: Re: [PATCH v3 5/5] udmabuf: remove udmabuf_folio
Hi Huan,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 033a4691702cdca3a613256b0623b8eeacb4985e]
url: https://github.com/intel-lab-lkp/linux/commits/Huan-Yang/udmabuf-cancel-mmap-page-fault-direct-map-it/20240814-231504
base: 033a4691702cdca3a613256b0623b8eeacb4985e
patch link: https://lore.kernel.org/r/20240813090518.3252469-6-link%40vivo.com
patch subject: [PATCH v3 5/5] udmabuf: remove udmabuf_folio
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20240816/202408162012.cL9pnFSm-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240816/202408162012.cL9pnFSm-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/202408162012.cL9pnFSm-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/dma-buf/udmabuf.c:175: warning: Function parameter or struct member 'ubuf' not described in 'unpin_all_folios'
vim +175 drivers/dma-buf/udmabuf.c
17a7ce20349045 Gurchetan Singh 2019-12-02 165
d934739404652b Huan Yang 2024-08-13 166 /**
d934739404652b Huan Yang 2024-08-13 167 * unpin_all_folios: unpin each folio we pinned in create
d934739404652b Huan Yang 2024-08-13 168 * The udmabuf set all folio in folios and pinned it, but for large folio,
d934739404652b Huan Yang 2024-08-13 169 * We may have only used a small portion of the physical in the folio.
d934739404652b Huan Yang 2024-08-13 170 * we will repeatedly, sequentially set the folio into the array to ensure
d934739404652b Huan Yang 2024-08-13 171 * that the offset can index the correct folio at the corresponding index.
d934739404652b Huan Yang 2024-08-13 172 * Hence, we only need to unpin the first iterred folio.
d934739404652b Huan Yang 2024-08-13 173 */
d934739404652b Huan Yang 2024-08-13 174 static void unpin_all_folios(struct udmabuf *ubuf)
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 @175 {
d934739404652b Huan Yang 2024-08-13 176 pgoff_t pg;
d934739404652b Huan Yang 2024-08-13 177 struct folio *last = NULL;
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 178
d934739404652b Huan Yang 2024-08-13 179 for (pg = 0; pg < ubuf->pagecount; pg++) {
d934739404652b Huan Yang 2024-08-13 180 struct folio *tmp = ubuf->folios[pg];
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 181
d934739404652b Huan Yang 2024-08-13 182 if (tmp == last)
d934739404652b Huan Yang 2024-08-13 183 continue;
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 184
d934739404652b Huan Yang 2024-08-13 185 last = tmp;
d934739404652b Huan Yang 2024-08-13 186 unpin_folio(tmp);
d934739404652b Huan Yang 2024-08-13 187 }
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 188 }
c6a3194c05e7e6 Vivek Kasireddy 2024-06-23 189
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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