Hi Daniel,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on driver-core/driver-core-testing pm/linux-next 
v5.10-rc6 next-20201130]
[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/Daniel-Scally/Add-functionality-to-ipu3-cio2-driver-allowing-software_node-connections-to-sensors-on-platforms-designed-for-Windows/20201130-214014
base:   git://linuxtv.org/media_tree.git master
config: x86_64-randconfig-a003-20201130 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 
dfcf1acf13226be0f599a7ab6b395b66dc9545d6)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # 
https://github.com/0day-ci/linux/commit/05cb91d6b6272c4516b21b0ecd23a6ff8d861aae
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Daniel-Scally/Add-functionality-to-ipu3-cio2-driver-allowing-software_node-connections-to-sensors-on-platforms-designed-for-Windows/20201130-214014
        git checkout 05cb91d6b6272c4516b21b0ecd23a6ff8d861aae
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/media/pci/intel/ipu3/ipu3-cio2-main.c:31:
>> drivers/media/pci/intel/ipu3/ipu3-cio2.h:443:5: warning: no previous 
>> prototype for function 'cio2_bridge_init' [-Wmissing-prototypes]
   int cio2_bridge_init(struct pci_dev *cio2) { return 0; }
       ^
   drivers/media/pci/intel/ipu3/ipu3-cio2.h:443:1: note: declare 'static' if 
the function is not intended to be used outside of this translation unit
   int cio2_bridge_init(struct pci_dev *cio2) { return 0; }
   ^
   static 
   1 warning generated.

vim +/cio2_bridge_init +443 drivers/media/pci/intel/ipu3/ipu3-cio2.h

   439  
   440  #if IS_ENABLED(CONFIG_CIO2_BRIDGE)
   441  int cio2_bridge_init(struct pci_dev *cio2);
   442  #else
 > 443  int cio2_bridge_init(struct pci_dev *cio2) { return 0; }
   444  #endif
   445  

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

Attachment: .config.gz
Description: application/gzip

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