Hi Andrey, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: daadb3bd0e8d3e317e36bc2c1542e86c528665e5 commit: db5b5c679e6cad2bb147337af6c378d278231b45 drm/amd/pm: Add STB support in sienna_cichlid date: 7 weeks ago config: arc-randconfig-r043-20220112 (https://download.01.org/0day-ci/archive/20220112/202201122225.jnBYBKaM-lk...) compiler: arceb-elf-gcc (GCC) 11.2.0 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout db5b5c679e6cad2bb147337af6c378d278231b45 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/ 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 >>): 3827 | int sienna_cichlid_stb_get_data_direct(struct smu_context *smu, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/sienna_cichlid_stb_get_data_direct +3827 drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/sienna_cichlid_ppt.c 3826 3828 void *buf, 3829 uint32_t size) 3830 { 3831 uint32_t *p = buf; 3832 struct amdgpu_device *adev = smu->adev; 3833 3834 /* No need to disable interrupts for now as we don't lock it yet from ISR */ 3835 spin_lock(&smu->stb_context.lock); 3836 3837 /* 3838 * Read the STB FIFO in units of 32bit since this is the accessor window 3839 * (register width) we have. 3840 */ 3841 buf = ((char *) buf) + size; 3842 while ((void *)p < buf) 3843 *p++ = cpu_to_le32(RREG32_PCIE(MP1_Public | smnMP1_PMI_3)); 3844 3845 spin_unlock(&smu->stb_context.lock); 3846 3847 return 0; 3848 } 3849 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org