[radeon-alex:amd-20.45 2387/2427] drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1284:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute - dri-devel - freedesktop.org experimental mailing list

15 Dec 2020


      Hi Guchun,
FYI, the error/warning still remains.
tree:   git://people.freedesktop.org/~agd5f/linux.git amd-20.45
head:   a3950d94b046fb206e58fd3ec717f071c0203ba3
commit: cf13e50dea28cde351fa32767e36135afb30386d [2387/2427] drm/amdgpu: clean up ras sysfs creation (v2)
config: x86_64-randconfig-a002-20201214 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project a29ecca7819a6ed4250d3689b12b1f664bb790d7)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git remote add radeon-alex git://people.freedesktop.org/~agd5f/linux.git
        git fetch --no-tags radeon-alex amd-20.45
        git checkout cf13e50dea28cde351fa32767e36135afb30386d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot lkp@intel.com
All warnings (new ones prefixed by >>):
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:906:5: warning: no previous prototype for function 'amdgpu_ras_error_cure' [-Wmissing-prototypes]
   int amdgpu_ras_error_cure(struct amdgpu_device *adev,
       ^
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:906:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int amdgpu_ras_error_cure(struct amdgpu_device *adev,
   ^
   static
...
...
drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:1284:2: warning: ignoring return value of function declared with 'warn_unused_result' attribute [-Wunused-result]
sysfs_create_group(&adev->dev->kobj, &group);
           ^~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.
vim +/warn_unused_result +1284 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
1249	
  1250	/* ras fs */
  1251	static BIN_ATTR(gpu_vram_bad_pages, S_IRUGO,
  1252			amdgpu_ras_sysfs_badpages_read, NULL, 0);
  1253	static DEVICE_ATTR(features, S_IRUGO,
  1254			amdgpu_ras_sysfs_features_read, NULL);
  1255	static int amdgpu_ras_fs_init(struct amdgpu_device *adev)
  1256	{
  1257		struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
  1258		struct attribute_group group = {
  1259			.name = RAS_FS_NAME,
  1260		};
  1261		struct attribute *attrs[] = {
  1262			&con->features_attr.attr,
  1263			NULL
  1264		};
  1265		struct bin_attribute *bin_attrs[] = {
  1266			NULL,
  1267			NULL,
  1268		};
  1269	
  1270		/* add features entry */
  1271		con->features_attr = dev_attr_features;
  1272		group.attrs = attrs;
  1273		sysfs_attr_init(attrs[0]);
  1274	
  1275		if (amdgpu_bad_page_threshold != 0) {
  1276			/* add bad_page_features entry */
  1277			bin_attr_gpu_vram_bad_pages.private = NULL;
  1278			con->badpages_attr = bin_attr_gpu_vram_bad_pages;
  1279			bin_attrs[0] = &con->badpages_attr;
  1280			group.bin_attrs = bin_attrs;
  1281			sysfs_bin_attr_init(bin_attrs[0]);
  1282		}
  1283
...
1284		sysfs_create_group(&adev->dev->kobj, &group);
1285	
  1286		return 0;
  1287	}
  1288
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org