[Intel-gfx] [PATCH 2/2] drm/i915/gem: Almagamate clflushes on freeze

[kernel test robot]

Hi Chris,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on drm-tip/drm-tip v5.11-rc2 next-20210104]
[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]

url:    https://github.com/0day-ci/linux/commits/Chris-Wilson/drm-i915-gem-Almagamate-clflushes-on-suspend/20210104-220329
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-a004-20210105 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 98cd1c33e3c2c3cfee36fb0fea3285fda06224d3)
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/54314b2c3991bf37b7a6bf3b35eee4179a5e908a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chris-Wilson/drm-i915-gem-Almagamate-clflushes-on-suspend/20210104-220329
        git checkout 54314b2c3991bf37b7a6bf3b35eee4179a5e908a
        # 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 at intel.com>

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/i915_gem.c:1286:2: error: implicit declaration of function 'wbinvd_on_all_cpus' [-Werror,-Wimplicit-function-declaration]
           wbinvd_on_all_cpus();
           ^
   1 error generated.


vim +/wbinvd_on_all_cpus +1286 drivers/gpu/drm/i915/i915_gem.c

  1261	
  1262	int i915_gem_freeze_late(struct drm_i915_private *i915)
  1263	{
  1264		struct drm_i915_gem_object *obj;
  1265		intel_wakeref_t wakeref;
  1266	
  1267		/*
  1268		 * Called just before we write the hibernation image.
  1269		 *
  1270		 * We need to update the domain tracking to reflect that the CPU
  1271		 * will be accessing all the pages to create and restore from the
  1272		 * hibernation, and so upon restoration those pages will be in the
  1273		 * CPU domain.
  1274		 *
  1275		 * To make sure the hibernation image contains the latest state,
  1276		 * we update that state just before writing out the image.
  1277		 *
  1278		 * To try and reduce the hibernation image, we manually shrink
  1279		 * the objects as well, see i915_gem_freeze()
  1280		 */
  1281	
  1282		with_intel_runtime_pm(&i915->runtime_pm, wakeref)
  1283			i915_gem_shrink(i915, -1UL, NULL, ~0);
  1284		i915_gem_drain_freed_objects(i915);
  1285	
> 1286		wbinvd_on_all_cpus();
  1287		list_for_each_entry(obj, &i915->mm.shrink_list, mm.link)
  1288			__start_cpu_write(obj);
  1289	
  1290		return 0;
  1291	}
  1292	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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