[PATCH 09/26] media: v4l2-dev: Add video_device_context_from_file()
kernel test robot
lkp at intel.com
Fri Jul 18 02:33:44 PDT 2025
Hi Jacopo,
kernel test robot noticed the following build warnings:
[auto build test WARNING on d968e50b5c26642754492dea23cbd3592bde62d8]
url: https://github.com/intel-lab-lkp/linux/commits/Jacopo-Mondi/media-mc-Add-per-file-handle-data-support/20250717-190546
base: d968e50b5c26642754492dea23cbd3592bde62d8
patch link: https://lore.kernel.org/r/20250717-multicontext-mainline-2025-v1-9-81ac18979c03%40ideasonboard.com
patch subject: [PATCH 09/26] media: v4l2-dev: Add video_device_context_from_file()
config: x86_64-buildonly-randconfig-004-20250718 (https://download.01.org/0day-ci/archive/20250718/202507181702.W5iinHRF-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250718/202507181702.W5iinHRF-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 at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507181702.W5iinHRF-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/media/v4l2-core/v4l2-dev.c:1184:1: warning: no previous prototype for function 'video_device_context_from_file' [-Wmissing-prototypes]
1184 | video_device_context_from_file(struct file *filp, struct video_device *vfd)
| ^
drivers/media/v4l2-core/v4l2-dev.c:1183:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
1183 | struct video_device_context *
| ^
| static
1 warning generated.
vim +/video_device_context_from_file +1184 drivers/media/v4l2-core/v4l2-dev.c
1182
1183 struct video_device_context *
> 1184 video_device_context_from_file(struct file *filp, struct video_device *vfd)
1185 {
1186 struct v4l2_fh *vfh =
1187 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? filp->private_data
1188 : NULL;
1189
1190 /* If the file handle has been bound to a context return it. */
1191 if (vfh && vfh->context)
1192 return vfh->context;
1193
1194 return vfd->default_context;
1195 }
1196 EXPORT_SYMBOL_GPL(video_device_context_from_file);
1197
--
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