From: kernel test robot <lkp@intel.com>
To: "Ville Syrjälä " <ville.syrjala@linux.intel.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: [vsyrjala:remap_tile_ys_64 16/30] drivers/gpu/drm/i915/display/intel_fb.c:1904:3: warning: variable 'plane_size' is uninitialized when used here
Date: Fri, 10 Apr 2026 13:06:04 +0800 [thread overview]
Message-ID: <202604091149.n5nJiAZm-lkp@intel.com> (raw)
tree: https://github.com/vsyrjala/linux.git remap_tile_ys_64
head: 9a8f5dc5c6e5da24a2df0e93fda770ab217b0886
commit: 03377854bbe51bfb4501ffb15cccc6b45ac74764 [16/30] drm/i915/vma: Add alignment_pad support for rotated views
config: i386-defconfig (https://download.01.org/0day-ci/archive/20260409/202604091149.n5nJiAZm-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260409/202604091149.n5nJiAZm-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604091149.n5nJiAZm-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/i915/display/intel_fb.c:1904:3: warning: variable 'plane_size' is uninitialized when used here [-Wuninitialized]
1904 | plane_size += rot_info->plane[i].dst_stride * rot_info->plane[i].width;
| ^~~~~~~~~~
drivers/gpu/drm/i915/display/intel_fb.c:1902:26: note: initialize the variable 'plane_size' to silence this warning
1902 | unsigned int plane_size;
| ^
| = 0
1 warning generated.
vim +/plane_size +1904 drivers/gpu/drm/i915/display/intel_fb.c
1895
1896 unsigned int intel_rotation_info_size(const struct intel_rotation_info *rot_info)
1897 {
1898 unsigned int size = 0;
1899 int i;
1900
1901 for (i = 0 ; i < ARRAY_SIZE(rot_info->plane); i++) {
1902 unsigned int plane_size;
1903
> 1904 plane_size += rot_info->plane[i].dst_stride * rot_info->plane[i].width;
1905
1906 if (plane_size == 0)
1907 continue;
1908
1909 if (rot_info->plane_alignment)
1910 size = ALIGN(size, rot_info->plane_alignment);
1911
1912 size += plane_size;
1913 }
1914
1915 return size;
1916 }
1917
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-04-10 5:06 UTC|newest]
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