Hi Maxime, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b9011c7e671dbbf59bb753283ddfd03f0c9eb865 commit: c7d30623540b6e979d7e8647fab18feab4688808 [3690/8423] drm/vc4: hdmi: Remove unused struct config: arm64-randconfig-r012-20210814 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1f7b25ea76a925aca690da28de9d78db7ca99d0c) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout c7d30623540b6e979d7e8647fab18feab4688808 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = { ^ static const struct snd_soc_dapm_route vc4_hdmi_audio_routes[] = { ^ 2 warnings generated. vim +/vc4_hdmi_audio_widgets +1406 drivers/gpu/drm/vc4/vc4_hdmi.c bb7d78568814a3 Eric Anholt 2017-02-27 1405 bb7d78568814a3 Eric Anholt 2017-02-27 @1406 static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = { bb7d78568814a3 Eric Anholt 2017-02-27 1407 SND_SOC_DAPM_OUTPUT("TX"), bb7d78568814a3 Eric Anholt 2017-02-27 1408 }; bb7d78568814a3 Eric Anholt 2017-02-27 1409 bb7d78568814a3 Eric Anholt 2017-02-27 @1410 static const struct snd_soc_dapm_route vc4_hdmi_audio_routes[] = { bb7d78568814a3 Eric Anholt 2017-02-27 1411 { "TX", NULL, "Playback" }, bb7d78568814a3 Eric Anholt 2017-02-27 1412 }; bb7d78568814a3 Eric Anholt 2017-02-27 1413 :::::: The code at line 1406 was first introduced by commit :::::: bb7d78568814a31a11fa14f1479a9fe51f1582ad drm/vc4: Add HDMI audio support :::::: TO: Eric Anholt <eric(a)anholt.net&gt; :::::: CC: Eric Anholt <eric(a)anholt.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org