[jsarha:topic/cros-sof-v4.19 4273/6555] drivers/gpu/drm/virtio/virtgpu_object.c:176:5: warning: no previous prototype for function 'virtio_gpu_dma_buf_to_handle'

[jsarha:topic/cros-sof-v4.19 4273/6555] drivers/gpu/drm/virtio/virtgpu_object.c:176:5: warning: no previous prototype for function 'virtio_gpu_dma_buf_to_handle'

[kernel test robot]

tree:   https://github.com/jsarha/linux topic/cros-sof-v4.19
head:   d7a3e91d8d16d1ef8653deec5a1fffc4de034a0c
commit: cea7ac75b0485305ef7d58b47c67d4ab82e620a3 [4273/6555] CHROMIUM: drm/virtio: Add interfaces to share dma bufs via virtwl.
config: x86_64-randconfig-a003-20220411 (https://download.01.org/0day-ci/archive/20220412/202204121116.G1ASG8mq-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project fe2478d44e4f7f191c43fef629ac7a23d0251e72)
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/jsarha/linux/commit/cea7ac75b0485305ef7d58b47c67d4ab82e620a3
        git remote add jsarha https://github.com/jsarha/linux
        git fetch --no-tags jsarha topic/cros-sof-v4.19
        git checkout cea7ac75b0485305ef7d58b47c67d4ab82e620a3
        # save the config file 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 drivers/gpu/drm/virtio/

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/virtio/virtgpu_object.c:176:5: warning: no previous prototype for function 'virtio_gpu_dma_buf_to_handle' [-Wmissing-prototypes]
   int virtio_gpu_dma_buf_to_handle(struct dma_buf *dma_buf, bool no_wait,
       ^
   drivers/gpu/drm/virtio/virtgpu_object.c:176:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int virtio_gpu_dma_buf_to_handle(struct dma_buf *dma_buf, bool no_wait,
   ^
   static 
   1 warning generated.


vim +/virtio_gpu_dma_buf_to_handle +176 drivers/gpu/drm/virtio/virtgpu_object.c

   175	
 > 176	int virtio_gpu_dma_buf_to_handle(struct dma_buf *dma_buf, bool no_wait,

-- 
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https://01.org/lkp