Hi Alex, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.9.y head: c2f4d81bca8d750005675a2b191222989fb9dece commit: 84493deabfd73f1d0200986ba9f4aab3d44b368b [1207/1456] drm/amdgpu/swsmu: drop smu i2c bus on navi1x config: powerpc-randconfig-r035-20201111 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project a719eef73ec447b2c5fc8b70f69564a2e0f78e1e) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-5.9.y git checkout 84493deabfd73f1d0200986ba9f4aab3d44b368b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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 i2c_algorithm navi10_i2c_algo = { ^ 1 warning generated. vim +/navi10_i2c_algo +2461 drivers/gpu/drm/amd/amdgpu/../powerplay/navi10_ppt.c 1bc734759f284eb Alex Deucher 2020-07-19 2459 1bc734759f284eb Alex Deucher 2020-07-19 2460 1bc734759f284eb Alex Deucher 2020-07-19 @2461 static const struct i2c_algorithm navi10_i2c_algo = { 1bc734759f284eb Alex Deucher 2020-07-19 2462 .master_xfer = navi10_i2c_xfer, 1bc734759f284eb Alex Deucher 2020-07-19 2463 .functionality = navi10_i2c_func, 1bc734759f284eb Alex Deucher 2020-07-19 2464 }; 1bc734759f284eb Alex Deucher 2020-07-19 2465 :::::: The code at line 2461 was first introduced by commit :::::: 1bc734759f284eb531dd474c72ce59874649a254 drm/amdgpu/navi1x: add SMU i2c support (v2) :::::: TO: Alex Deucher <alexander.deucher(a)amd.com&gt; :::::: CC: Alex Deucher <alexander.deucher(a)amd.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org