Hi Paulo, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y head: e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b commit: 760f8522ce08a24abac3208290f93fe3fffc0d6c [6067/9999] selinux: use kernel linux/socket.h for genheaders and mdp config: i386-allyesconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.14.y git checkout 760f8522ce08a24abac3208290f93fe3fffc0d6c # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen6_dump_ppgtt': drivers/gpu/drm/i915/i915_gem_gtt.c:1396:26: error: variable 'unused' set but not used [-Werror=unused-but-set-variable] struct i915_page_table *unused; ^~~~~~ drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen6_scratch_va_range': drivers/gpu/drm/i915/i915_gem_gtt.c:1781:26: error: variable 'unused' set but not used [-Werror=unused-but-set-variable] struct i915_page_table *unused; ^~~~~~ In file included from drivers/gpu/drm/i915/i915_gem_gtt.c:3574:0: drivers/gpu/drm/i915/selftests/i915_gem_gtt.c: In function 'close_object_list': int ignored; ^~~~~~~ cc1: all warnings being treated as errors vim +/ignored +290 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c 4a6f13fce1331d Chris Wilson 2017-02-13 285 8d28ba4568f497 Chris Wilson 2017-02-13 286 static void close_object_list(struct list_head *objects, 8d28ba4568f497 Chris Wilson 2017-02-13 287 struct i915_address_space *vm) 8d28ba4568f497 Chris Wilson 2017-02-13 288 { 8d28ba4568f497 Chris Wilson 2017-02-13 289 struct drm_i915_gem_object *obj, *on; aae4a3d811753d Chris Wilson 2017-02-13 @290 int ignored; 8d28ba4568f497 Chris Wilson 2017-02-13 291 8d28ba4568f497 Chris Wilson 2017-02-13 292 list_for_each_entry_safe(obj, on, objects, st_link) { 8d28ba4568f497 Chris Wilson 2017-02-13 293 struct i915_vma *vma; 8d28ba4568f497 Chris Wilson 2017-02-13 294 8d28ba4568f497 Chris Wilson 2017-02-13 295 vma = i915_vma_instance(obj, vm, NULL); aae4a3d811753d Chris Wilson 2017-02-13 296 if (!IS_ERR(vma)) aae4a3d811753d Chris Wilson 2017-02-13 297 ignored = i915_vma_unbind(vma); 62c981cfe78513 Chris Wilson 2017-02-13 298 /* Only ppgtt vma may be closed before the object is freed */ 62c981cfe78513 Chris Wilson 2017-02-13 299 if (!IS_ERR(vma) && !i915_vma_is_ggtt(vma)) 8d28ba4568f497 Chris Wilson 2017-02-13 300 i915_vma_close(vma); 8d28ba4568f497 Chris Wilson 2017-02-13 301 8d28ba4568f497 Chris Wilson 2017-02-13 302 list_del(&obj->st_link); 8d28ba4568f497 Chris Wilson 2017-02-13 303 i915_gem_object_put(obj); 8d28ba4568f497 Chris Wilson 2017-02-13 304 } 8d28ba4568f497 Chris Wilson 2017-02-13 305 } 8d28ba4568f497 Chris Wilson 2017-02-13 306 :::::: The code at line 290 was first introduced by commit :::::: aae4a3d811753d3f79c43c932b8f7d1bcbf42fb0 drm/i915: Use fault-injection to force the shrinker to run in live GTT tests :::::: TO: Chris Wilson <chris(a)chris-wilson.co.uk&gt; :::::: CC: Chris Wilson <chris(a)chris-wilson.co.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org