Hi Nirmoy, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm-tip/drm-tip linus/master v5.7-rc3 next-20200429] [cannot apply to drm/drm-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Nirmoy-Das/drm-mm-optimize-rb_hole_addr-rbtree-search-in-high-addr-mode/20200429-154950 base: git://anongit.freedesktop.org/drm-intel for-linux-next reproduce: # apt-get install sparse # sparse version: v0.6.1-191-gc51a0382-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/gpu/drm/drm_mm.c:455:24: sparse: sparse: Using plain integer as NULL pointer vim +455 drivers/gpu/drm/drm_mm.c 431 432 /** 433 * next_hole_high_addr - returns next hole for a DRM_MM_INSERT_HIGH mode request 434 * @entry: previously selected drm_mm_node 435 * @size: size of the a hole needed for the request 436 * 437 * This function will verify whether left subtree of @entry has hole big enough 438 * to fit the requtested size. If so, it will return previous node of @entry or 439 * else it will return parent node of @entry 440 * 441 * It will also skip the complete left subtree if max_hole_size of that subtree 442 * is same as the max_hole_size of the @entry. 443 * 444 * Returns: 445 * previous node of @entry if left subtree of @entry can serve the request or 446 * else return parent of @entry 447 */ 448 static struct drm_mm_node * 449 next_hole_high_addr(struct drm_mm_node *entry, u64 size) 450 { 451 struct rb_node *rb_node, *left_rb_node, *parent_rb_node; 452 struct drm_mm_node *left_node; 453 454 if (!entry) > 455 return false; 456 457 rb_node = &entry->rb_hole_addr; 458 if (rb_node->rb_left) { 459 left_rb_node = rb_node->rb_left; 460 parent_rb_node = rb_parent(rb_node); 461 left_node = rb_entry(left_rb_node, 462 struct drm_mm_node, rb_hole_addr); 463 if ((left_node->max_hole_size < size || 464 entry->size == entry->max_hole_size) && 465 parent_rb_node && parent_rb_node->rb_left != rb_node) 466 return rb_hole_addr_to_node(parent_rb_node); 467 } 468 469 return rb_hole_addr_to_node(rb_prev(rb_node)); 470 } 471 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
