tree: https://github.com/0day-ci/linux/commits/UPDATE-20210210-181758/Chris-Wil... head: 1f7d2908ed9121500324cfa7c81236dbf5f0d20d commit: 1f7d2908ed9121500324cfa7c81236dbf5f0d20d drm/i915: Check for scratch page scribbling date: 20 hours ago config: x86_64-randconfig-a013-20210209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 # https://github.com/0day-ci/linux/commit/1f7d2908ed9121500324cfa7c81236dbf... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210210-181758/Chris-Wilson/drm-i915-Check-for-scratch-page-scribbling/20210210-180810 git checkout 1f7d2908ed9121500324cfa7c81236dbf5f0d20d # 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(a)intel.com&gt; All errors (new ones prefixed by >>): set_page_dirty(pages); /* keep the poisoned contents */ ^~~~~ page drivers/gpu/drm/i915/gt/intel_gtt.c:149:15: note: 'page' declared here struct page *page; ^ 1 error generated. vim +161 drivers/gpu/drm/i915/gt/intel_gtt.c 145 146 static void poison_scratch_page(struct drm_i915_gem_object *scratch) 147 { 148 struct sgt_iter sgt; 149 struct page *page; 150 u8 val; 151 152 val = 0; 153 if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM)) 154 val = POISON_FREE; 155 156 for_each_sgt_page(page, sgt, scratch->mm.pages) { 157 void *vaddr; 158 159 vaddr = kmap(page); 160 memset(vaddr, val, PAGE_SIZE); 162 kunmap(page); 163 } 164 } 165 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org