Hi Marvin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on linux/master linus/master v5.18-rc6] [cannot apply to media-tree/master next-20220513] [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/intel-lab-lkp/linux/commits/Marvin-Lin/Support-Nuvoton-NPCM-Video-Capture-Encode-Engine/20220513-113806 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220514/202205141815.QVBWWaqM-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 38189438b69ca27b4c6ce707c52dbd217583d046) 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/intel-lab-lkp/linux/commit/7fa1f7750e7317479ce2c2c043b44fa19c46b1a8 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Marvin-Lin/Support-Nuvoton-NPCM-Video-Capture-Encode-Engine/20220513-113806 git checkout 7fa1f7750e7317479ce2c2c043b44fa19c46b1a8 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/media/platform/nuvoton/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/media/platform/nuvoton/npcm-video.c:1776:6: warning: variable 'empty' set but not used [-Wunused-but-set-variable] int empty; ^ 1 warning generated. vim +/empty +1776 drivers/media/platform/nuvoton/npcm-video.c 1773 1774 static void nuvoton_video_buf_queue(struct vb2_buffer *vb) 1775 { > 1776 int empty; 1777 struct nuvoton_video *video = vb2_get_drv_priv(vb->vb2_queue); 1778 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1779 struct nuvoton_video_buffer *nvb = to_nuvoton_video_buffer(vbuf); 1780 unsigned long flags; 1781 1782 dev_dbg(video->dev, "%s\n", __func__); 1783 1784 spin_lock_irqsave(&video->lock, flags); 1785 empty = list_empty(&video->buffers); 1786 list_add_tail(&nvb->link, &video->buffers); 1787 spin_unlock_irqrestore(&video->lock, flags); 1788 } 1789 -- 0-DAY CI Kernel Test Service https://01.org/lkp
