[kbuild-all] [mlankhorst:locking-rework 30/31] drivers/gpu/drm/i915/gem/i915_gem_object.c:290: undefined reference to `stack_depot_save'

tree: git://people.freedesktop.org/~mlankhorst/linux locking-rework head: f184f0be6c5c9ded15582c2ed5be90f0d74d41e1 commit: 42d16741d18f35ea99a876dd1614f3e7889b352b [30/31] drm/i915: Add freed object debugging by freeing synchronously. config: i386-randconfig-r026-20200810 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 42d16741d18f35ea99a876dd1614f3e7889b352b # 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 >>): ld: drivers/gpu/drm/i915/gem/i915_gem_object.o: in function `save_stack': ld: drivers/gpu/drm/i915/i915_gem.o: in function `dump_freed_obj': vim +290 drivers/gpu/drm/i915/gem/i915_gem_object.c 281 282 static noinline void save_stack(struct drm_i915_gem_object *obj) 283 { 284 unsigned long entries[32]; 285 unsigned int n; 286 287 n = stack_trace_save(entries, ARRAY_SIZE(entries), 1); 288 289 /* May be called under spinlock, so avoid sleeping */ 291 } 292 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org