tree: git://people.freedesktop.org/~mlankhorst/linux locking-rework head: 93635df9d2cb90420b6a12d3125708d7835dc273 commit: e1a39c7284bff8995e43acbcccfc3ff2681e067a [4/63] drm/i915: Pin timeline map after first timeline pin, v3. config: i386-randconfig-s002-20201016 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-rc1-2-g368fd9ce-dirty git remote add mlankhorst git://people.freedesktop.org/~mlankhorst/linux git fetch --no-tags mlankhorst locking-rework git checkout e1a39c7284bff8995e43acbcccfc3ff2681e067a # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" vim +67 drivers/gpu/drm/i915/gt/intel_timeline.c 53 54 I915_SELFTEST_EXPORT int 55 intel_timeline_pin_map(struct intel_timeline *timeline) 56 { 57 struct drm_i915_gem_object *obj = timeline->hwsp_ggtt->obj; 58 u32 ofs = offset_in_page(timeline->hwsp_offset); 59 void *vaddr; 60 61 vaddr = i915_gem_object_pin_map(obj, I915_MAP_WB); 62 if (IS_ERR(vaddr)) 63 return PTR_ERR(vaddr); 64 65 timeline->hwsp_map = vaddr; 66 timeline->hwsp_seqno = memset(vaddr + ofs, 0, CACHELINE_BYTES); 68 69 return 0; 70 } 71 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org