Hi oushixiong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm/drm-next] [also build test WARNING on drm-intel/for-linux-next linus/master v5.19 next-20220810] [cannot apply to drm-misc/drm-misc-next drm-tip/drm-tip] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/oushixiong/drm-ast-radeon-amdgpu-for-ast-add-prime/20220810-100424 base: git://anongit.freedesktop.org/drm/drm drm-next config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220810/202208102237.Mz7bao9A-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/a2b719dc6ac02cee10916696a4ba1caf7b24b20f git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review oushixiong/drm-ast-radeon-amdgpu-for-ast-add-prime/20220810-100424 git checkout a2b719dc6ac02cee10916696a4ba1caf7b24b20f # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/ast/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/gpu/drm/ast/ast_drv.c:54:24: warning: no previous prototype for 'ast_gem_prime_import_sg_table' [-Wmissing-prototypes] 54 | struct drm_gem_object *ast_gem_prime_import_sg_table(struct drm_device *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- >> drivers/gpu/drm/ast/ast_mode.c:1713:5: warning: no previous prototype for 'ast_handle_damage' [-Wmissing-prototypes] 1713 | int ast_handle_damage(struct drm_framebuffer *fb, int x, int y, | ^~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/ast/ast_mode.c:1772:5: warning: no previous prototype for 'ast_user_framebuffer_dirty' [-Wmissing-prototypes] 1772 | int ast_user_framebuffer_dirty(struct drm_framebuffer *fb, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> drivers/gpu/drm/ast/ast_mode.c:1815:1: warning: no previous prototype for 'ast_gem_fb_create_with_dirty' [-Wmissing-prototypes] 1815 | ast_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/ast_gem_prime_import_sg_table +54 drivers/gpu/drm/ast/ast_drv.c 53 > 54 struct drm_gem_object *ast_gem_prime_import_sg_table(struct drm_device *dev, 55 struct dma_buf_attachment *attach, 56 struct sg_table *sg) 57 { 58 struct drm_gem_vram_object *gbo; 59 struct dma_resv *resv = attach->dmabuf->resv; 60 61 ww_mutex_lock(&resv->lock, NULL); 62 gbo = drm_gem_vram_create(dev, attach->dmabuf->size, 0, sg, resv); 63 ww_mutex_unlock(&resv->lock); 64 65 if (IS_ERR(gbo)) 66 return NULL; 67 68 return &gbo->bo.base; 69 } 70 -- 0-DAY CI Kernel Test Service https://01.org/lkp