[PATCH v4 18/25] drm/renesas/rz-du: Compute dumb-buffer sizes with drm_mode_size_dumb()

[kernel test robot]

Hi Thomas,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20250311]
[also build test ERROR on v6.14-rc6]
[cannot apply to drm-exynos/exynos-drm-next rockchip/for-next tegra/for-next drm-xe/drm-xe-next linus/master v6.14-rc6 v6.14-rc5 v6.14-rc4]
[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/Thomas-Zimmermann/drm-dumb-buffers-Sanitize-output-on-errors/20250311-235818
base:   next-20250311
patch link:    https://lore.kernel.org/r/20250311155120.442633-19-tzimmermann%40suse.de
patch subject: [PATCH v4 18/25] drm/renesas/rz-du: Compute dumb-buffer sizes with drm_mode_size_dumb()
config: i386-buildonly-randconfig-003-20250313 (https://download.01.org/0day-ci/archive/20250313/202503131309.ZzS9Tova-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250313/202503131309.ZzS9Tova-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503131309.ZzS9Tova-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c:10:
   In file included from include/drm/drm_atomic.h:31:
   In file included from include/drm/drm_crtc.h:32:
   In file included from include/drm/drm_modes.h:33:
   In file included from include/drm/drm_connector.h:32:
   In file included from include/drm/drm_util.h:36:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:28:
   In file included from include/linux/ftrace.h:13:
   In file included from include/linux/kallsyms.h:13:
   In file included from include/linux/mm.h:2296:
   include/linux/vmstat.h:507:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     507 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c:80:8: error: call to undeclared function 'drm_mode_size_dumb'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      80 |         ret = drm_mode_size_dumb(dev, args, 16 * args->bpp / 8, 0);
         |               ^
   drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c:80:8: note: did you mean 'drm_mode_set_name'?
   include/drm/drm_modes.h:530:6: note: 'drm_mode_set_name' declared here
     530 | void drm_mode_set_name(struct drm_display_mode *mode);
         |      ^
   1 warning and 1 error generated.


vim +/drm_mode_size_dumb +80 drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c

    70	
    71	/* -----------------------------------------------------------------------------
    72	 * Frame buffer
    73	 */
    74	
    75	int rzg2l_du_dumb_create(struct drm_file *file, struct drm_device *dev,
    76				 struct drm_mode_create_dumb *args)
    77	{
    78		int ret;
    79	
  > 80		ret = drm_mode_size_dumb(dev, args, 16 * args->bpp / 8, 0);
    81		if (ret)
    82			return ret;
    83	
    84		return drm_gem_dma_dumb_create_internal(file, dev, args);
    85	}
    86	

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