tree: https://github.com/intel/linux-intel-lts.git 5.4/preempt-rt head: 6fa41e866e0be2824b0f5efb593f8635ee2a3bde commit: 1f6599c5a14ced4e22b1b656bd1402eca58e1ed5 [201/879] drm,i915: Use local_lock/unlock_irq() in intel_pipe_update_start/end() config: x86_64-randconfig-r031-20200820 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4deda57106f7c9b982a49cb907c33e3966c8de7f) 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 git checkout 1f6599c5a14ced4e22b1b656bd1402eca58e1ed5 # 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 >>): static DEFINE_LOCAL_IRQ_LOCK(pipe_update_lock); ^ 1 warning generated. # https://github.com/intel/linux-intel-lts/commit/1f6599c5a14ced4e22b1b656b... git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-linux-intel-lts 5.4/preempt-rt git checkout 1f6599c5a14ced4e22b1b656bd1402eca58e1ed5 vim +/pipe_update_lock +75 drivers/gpu/drm/i915/display/intel_sprite.c 74 76 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org