tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b4bb878f3eb3e604ebfe83bbc17eb7af8d99cbf4 commit: 49b1a685bb601e62b7fdccce8cfc040381b1d581 [4321/4407] Merge remote-tracking branch 'amdgpu/drm-next' config: x86_64-randconfig-a005-20210118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 22b68440e1647e16b5ee24b924986207173c02d1) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-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 49b1a685bb601e62b7fdccce8cfc040381b1d581 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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 >>): vim +141 drivers/gpu/drm/amd/amdgpu/../display/dc/bios/command_table_helper2.c ae79c310b1a6f974 Harry Wentland 2017-03-06 129 ae79c310b1a6f974 Harry Wentland 2017-03-06 130 /** 051a887f29350432 Lee Jones 2021-01-08 131 * translate_transmitter_bp_to_atom2 - Translate the Transmitter to the 051a887f29350432 Lee Jones 2021-01-08 132 * corresponding ATOM BIOS value 051a887f29350432 Lee Jones 2021-01-08 133 * @t: transmitter 051a887f29350432 Lee Jones 2021-01-08 134 * returns: digitalTransmitter ae79c310b1a6f974 Harry Wentland 2017-03-06 135 * // =00: Digital Transmitter1 ( UNIPHY linkAB ) ae79c310b1a6f974 Harry Wentland 2017-03-06 136 * // =01: Digital Transmitter2 ( UNIPHY linkCD ) ae79c310b1a6f974 Harry Wentland 2017-03-06 137 * // =02: Digital Transmitter3 ( UNIPHY linkEF ) ae79c310b1a6f974 Harry Wentland 2017-03-06 138 */ ae79c310b1a6f974 Harry Wentland 2017-03-06 139 uint8_t dal_cmd_table_helper_transmitter_bp_to_atom2( ae79c310b1a6f974 Harry Wentland 2017-03-06 140 enum transmitter t) ae79c310b1a6f974 Harry Wentland 2017-03-06 @141 { ae79c310b1a6f974 Harry Wentland 2017-03-06 142 switch (t) { ae79c310b1a6f974 Harry Wentland 2017-03-06 143 case TRANSMITTER_UNIPHY_A: ae79c310b1a6f974 Harry Wentland 2017-03-06 144 case TRANSMITTER_UNIPHY_B: ae79c310b1a6f974 Harry Wentland 2017-03-06 145 case TRANSMITTER_TRAVIS_LCD: ae79c310b1a6f974 Harry Wentland 2017-03-06 146 return 0; ae79c310b1a6f974 Harry Wentland 2017-03-06 147 case TRANSMITTER_UNIPHY_C: ae79c310b1a6f974 Harry Wentland 2017-03-06 148 case TRANSMITTER_UNIPHY_D: ae79c310b1a6f974 Harry Wentland 2017-03-06 149 return 1; ae79c310b1a6f974 Harry Wentland 2017-03-06 150 case TRANSMITTER_UNIPHY_E: ae79c310b1a6f974 Harry Wentland 2017-03-06 151 case TRANSMITTER_UNIPHY_F: ae79c310b1a6f974 Harry Wentland 2017-03-06 152 return 2; ae79c310b1a6f974 Harry Wentland 2017-03-06 153 default: ae79c310b1a6f974 Harry Wentland 2017-03-06 154 /* Invalid Transmitter Type! */ ae79c310b1a6f974 Harry Wentland 2017-03-06 155 BREAK_TO_DEBUGGER(); ae79c310b1a6f974 Harry Wentland 2017-03-06 156 return 0; ae79c310b1a6f974 Harry Wentland 2017-03-06 157 } ae79c310b1a6f974 Harry Wentland 2017-03-06 158 } ae79c310b1a6f974 Harry Wentland 2017-03-06 159 :::::: The code at line 141 was first introduced by commit :::::: ae79c310b1a6f97429a5784b65f125d9cc9c95b1 drm/amd/display: Add DCE12 bios parser support :::::: TO: Harry Wentland <harry.wentland(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