Re: [PATCH RFC 2/6] dmaengine: Make of_dma_request_slave_channel pass a cookie to of_xlate

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

Hi Konrad,

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

[auto build test ERROR on 79fb37f39b77bbf9a56304e9af843cd93a7a1916]

url:    https://github.com/intel-lab-lkp/linux/commits/Konrad-Dybcio/dt-bindings-dma-qcom-gpi-Retire-passing-the-protocol-ID/20250730-173806
base:   79fb37f39b77bbf9a56304e9af843cd93a7a1916
patch link:    https://lore.kernel.org/r/20250730-topic-dma_genise_cookie-v1-2-b505c1238f9f%40oss.qualcomm.com
patch subject: [PATCH RFC 2/6] dmaengine: Make of_dma_request_slave_channel pass a cookie to of_xlate
config: i386-buildonly-randconfig-001-20250731 (https://download.01.org/0day-ci/archive/20250731/202507310304.OdNSnFmm-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250731/202507310304.OdNSnFmm-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/202507310304.OdNSnFmm-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from drivers/ntb/ntb_transport.c:52:
>> include/linux/dmaengine.h:1555:18: warning: no previous prototype for 'dma_request_chan_w_data' [-Wmissing-prototypes]
    1555 | struct dma_chan *dma_request_chan_w_data(struct device *dev,
         |                  ^~~~~~~~~~~~~~~~~~~~~~~
--
   ld: drivers/md/raid5-cache.o: in function `dma_request_chan_w_data':
>> raid5-cache.c:(.text+0x31dc): multiple definition of `dma_request_chan_w_data'; drivers/md/raid5.o:raid5.c:(.text+0x735c): first defined here
   ld: drivers/md/raid5-ppl.o: in function `dma_request_chan_w_data':
   raid5-ppl.c:(.text+0x1f54): multiple definition of `dma_request_chan_w_data'; drivers/md/raid5.o:raid5.c:(.text+0x735c): first defined here

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