[PATCH 2/2] drm: Remove CONFIG_DRM_KMS_CMA_HELPER option

Thomas Zimmermann tzimmermann at suse.de
Sun Nov 7 06:49:33 AEDT 2021


Am 05.11.21 um 18:59 schrieb Daniel Vetter:
> On Mon, Nov 01, 2021 at 11:59:15PM +0800, kernel test robot wrote:
>> Hi Thomas,
>> I love your patch! Yet something to improve:
>> [auto build test ERROR on next-20211029]
>> [cannot apply to drm/drm-next shawnguo/for-next pinchartl-media/drm/du/next v5.15 v5.15-rc7 v5.15-rc6 v5.15]
>> [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]
>> url:    https://github.com/0day-ci/linux/commits/Thomas-Zimmermann/drm-Small-CMA-cleanups/20211101-161911
>> base:    bdcc9f6a568275aed4cc32fd2312432d2ff1b704
>> config: x86_64-randconfig-a004-20211101 (attached as .config)
>> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82ed106567063ea269c6d5669278b733e173a42f)
>> reproduce (this is a W=1 build):
>>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>          chmod +x ~/bin/make.cross
>>          # https://github.com/0day-ci/linux/commit/c3c7ec5f9ccd90e78f0f2d3143505db4060bbf17
>>          git remote add linux-review https://github.com/0day-ci/linux
>>          git fetch --no-tags linux-review Thomas-Zimmermann/drm-Small-CMA-cleanups/20211101-161911
>>          git checkout c3c7ec5f9ccd90e78f0f2d3143505db4060bbf17
>>          # save the attached .config to linux build tree
>>          mkdir build_dir
>>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp at intel.com>
>> All errors (new ones prefixed by >>, old ones prefixed by <<):
>>>> ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vmap from namespace DMA_BUF, but does not import it.
>>>> ERROR: modpost: module drm_cma_helper uses symbol dma_buf_vunmap from namespace DMA_BUF, but does not import it.
> I guess this is simply because kbuild tests on top of linux-next, where
> the namespacing is a bit funny. We might need a fixup when we backmerge.
> Either way this looks like a good simplification to me, on the series:
> Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

Thanks a lot. We fixed the namespace problem in 675053115e4e ("drm: 
import DMA_BUF module namespace"). But the dma-buf namespace patch is 
not in drm-misc trees. Given how widely used the dma-buf interface is, 
the backmerge will indeed cause some trouble.

I meanwhile sent out the patchset with a base commit. Kernel CI will 
hopefully succeed now.

Best regards

>> ---
>> 0-DAY CI Kernel Test Service, Intel Corporation
>> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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