Hi Stanislav, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip v5.16-rc4 next-20211207] [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/Stanislav-Lisovskiy/drm-i915-Pas... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-a011-20211207 (https://download.01.org/0day-ci/archive/20211208/202112080246.3GudCMkc-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) 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/0day-ci/linux/commit/8c7a53ddec5435d127040d03a1eb073ec... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stanislav-Lisovskiy/drm-i915-Pass-plane-to-watermark-calculation-functions/20211207-190910 git checkout 8c7a53ddec5435d127040d03a1eb073ec71608dc # 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=i386 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): bool dg2_async_flip_optimization(struct drm_i915_private *i915, ^ drivers/gpu/drm/i915/intel_pm.c:5500:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool dg2_async_flip_optimization(struct drm_i915_private *i915, ^ static 1 warning generated. vim +/dg2_async_flip_optimization +5500 drivers/gpu/drm/i915/intel_pm.c 5499 5501 const struct intel_crtc_state *crtc_state, 5502 const struct intel_plane *plane) 5503 { 5504 return DISPLAY_VER(i915) >= 13 && 5505 crtc_state->uapi.async_flip && 5506 plane->async_flip; 5507 } 5508 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org