tree: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next head: 07775fc13878cbc2e9cda5ffac7c7289adee91cb commit: f89f8c6bafd0692d3afd21488d012ceb1baf6df6 [8/16] drm/amdgpu: Guard against write accesses after device removal config: powerpc64-randconfig-r026-20210520 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project bf9ef3efaa99c02e7bfc4c57207301b8de39a278) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu git remote add drm-drm-misc git://anongit.freedesktop.org/drm/drm-misc git fetch --no-tags drm-drm-misc drm-misc-next git checkout f89f8c6bafd0692d3afd21488d012ceb1baf6df6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): exit: ^~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:1140:18: warning: result of comparison of constant 4294967296 with expression of type 'resource_size_t' (aka 'unsigned int') is always false [-Wtautological-constant-out-of-range-compare] res->start > 0x100000000ull) ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4662:6: warning: no previous prototype for function 'amdgpu_device_recheck_guilty_jobs' [-Wmissing-prototypes] void amdgpu_device_recheck_guilty_jobs( ^ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c:4662:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void amdgpu_device_recheck_guilty_jobs( ^ static 3 warnings generated. vim +/exit +332 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 315 316 spin_lock_irqsave(&adev->mmio_idx_lock, flags); 317 for (last = pos + size; pos < last; pos += 4) { 318 uint32_t tmp = pos >> 31; 319 320 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)pos) | 0x80000000); 321 if (tmp != hi) { 322 WREG32_NO_KIQ(mmMM_INDEX_HI, tmp); 323 hi = tmp; 324 } 325 if (write) 326 WREG32_NO_KIQ(mmMM_DATA, *buf++); 327 else 328 *buf++ = RREG32_NO_KIQ(mmMM_DATA); 329 } 330 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags); 331 333 drm_dev_exit(idx); 334 } 335 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org