Hi Huang, I love your patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-intel/for-linux-next drm-tip/drm-tip v5.16-rc5 next-20211214] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Huang-Rui/drm-amdgpu-introduce-n... base: git://anongit.freedesktop.org/drm/drm drm-next config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20211215/202112152115.sqAqnvG7-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/a47becf231b123760625c45242e89f5e5... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Huang-Rui/drm-amdgpu-introduce-new-amdgpu_fence-object-to-indicate-the-job-embedded-fence/20211215-143731 git checkout a47becf231b123760625c45242e89f5e5b5b4915 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/ 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 +631 drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c 623 624 /** 625 * amdgpu_fence_clear_job_fences - clear job embedded fences of ring 626 * 627 * @ring: fence of the ring to be cleared 628 * 629 */ 630 void amdgpu_fence_driver_clear_job_fences(struct amdgpu_ring *ring) 632 int i; 633 struct dma_fence *old, **ptr; 634 635 for (i = 0; i <= ring->fence_drv.num_fences_mask; i++) { 636 ptr = &ring->fence_drv.fences[i]; 637 old = rcu_dereference_protected(*ptr, 1); 638 if (old && old->ops == &amdgpu_job_fence_ops) 639 RCU_INIT_POINTER(*ptr, NULL); 640 } 641 } 642 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org