Re: [RFC PATCH 1/1] dmaengine: introduce dmaengine_bh_wq and bh helpers

[kernel test robot <lkp@intel.com>]

Hi Allen,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:

[auto build test ERROR on vkoul-dmaengine/next]
[also build test ERROR on shawnguo/for-next sunxi/sunxi/for-next soc/for-next linus/master v6.19-rc5 next-20260114]
[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/Allen-Pais/dmaengine-introduce-dmaengine_bh_wq-and-bh-helpers/20260108-164201
base:   https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next
patch link:    https://lore.kernel.org/r/20260108080332.2341725-2-allen.lkml%40gmail.com
patch subject: [RFC PATCH 1/1] dmaengine: introduce dmaengine_bh_wq and bh helpers
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20260114/202601141622.CAk5SXFi-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260114/202601141622.CAk5SXFi-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601141622.CAk5SXFi-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/dma/hsu/hsu.c:22:
   In file included from include/linux/dmaengine.h:12:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/dma/hsu/hsu.c:503:29: error: no member named 'task' in 'struct virt_dma_chan'
     503 |                 tasklet_kill(&hsuc->vchan.task);
         |                               ~~~~~~~~~~~ ^
   1 warning and 1 error generated.


vim +503 drivers/dma/hsu/hsu.c

2b49e0c56741fc Andy Shevchenko 2015-02-23  492  
2b49e0c56741fc Andy Shevchenko 2015-02-23  493  int hsu_dma_remove(struct hsu_dma_chip *chip)
2b49e0c56741fc Andy Shevchenko 2015-02-23  494  {
2b49e0c56741fc Andy Shevchenko 2015-02-23  495  	struct hsu_dma *hsu = chip->hsu;
2b49e0c56741fc Andy Shevchenko 2015-02-23  496  	unsigned short i;
2b49e0c56741fc Andy Shevchenko 2015-02-23  497  
2b49e0c56741fc Andy Shevchenko 2015-02-23  498  	dma_async_device_unregister(&hsu->dma);
2b49e0c56741fc Andy Shevchenko 2015-02-23  499  
4c97ad993d7639 Heikki Krogerus 2015-10-13  500  	for (i = 0; i < hsu->nr_channels; i++) {
2b49e0c56741fc Andy Shevchenko 2015-02-23  501  		struct hsu_dma_chan *hsuc = &hsu->chan[i];
2b49e0c56741fc Andy Shevchenko 2015-02-23  502  
2b49e0c56741fc Andy Shevchenko 2015-02-23 @503  		tasklet_kill(&hsuc->vchan.task);
2b49e0c56741fc Andy Shevchenko 2015-02-23  504  	}
2b49e0c56741fc Andy Shevchenko 2015-02-23  505  
2b49e0c56741fc Andy Shevchenko 2015-02-23  506  	return 0;
2b49e0c56741fc Andy Shevchenko 2015-02-23  507  }
2b49e0c56741fc Andy Shevchenko 2015-02-23  508  EXPORT_SYMBOL_GPL(hsu_dma_remove);
2b49e0c56741fc Andy Shevchenko 2015-02-23  509  

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