tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git fscache-iter head: 59f33c90ef6c1a75d4af75e5f60d98c0d965b6a2 commit: 667b9011d562075c1d4e831862efa31f2f47fba0 [21/61] fscache: Replace the object management state machine config: i386-randconfig-a016-20200521 (attached as .config) compiler: gcc-4.9 (Ubuntu 4.9.3-13ubuntu2) 4.9.3 reproduce (this is a W=1 build): git checkout 667b9011d562075c1d4e831862efa31f2f47fba0 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/export.h:43:0, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from include/linux/list.h:9, from include/linux/module.h:12, from fs/fscache/obj.c:12: fs/fscache/obj.c: In function 'fscache_drop_object': ASSERTCMP(cookie->stage, ==, FSCACHE_COOKIE_STAGE_DEAD); ^ include/linux/compiler.h:78:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ ASSERTCMP(cookie->stage, ==, FSCACHE_COOKIE_STAGE_DEAD); ^ vim +278 fs/fscache/obj.c 267 268 /* 269 * Drop an object's attachments 270 */ 271 void fscache_drop_object(struct fscache_cookie *cookie, 272 struct fscache_object *object, 273 bool invalidate) 274 { 275 struct fscache_object *parent = object->parent; 276 struct fscache_cache *cache = object->cache; 277 279 280 _enter("{OBJ%x,%d},%u", 281 object->debug_id, object->n_children, invalidate); 282 283 if (!invalidate && 284 test_bit(FSCACHE_OBJECT_NEEDS_UPDATE, &object->flags)) { 285 _debug("final update"); 286 fscache_do_update_object(object); 287 } 288 289 spin_lock(&cache->object_list_lock); 290 list_del_init(&object->cache_link); 291 spin_unlock(&cache->object_list_lock); 292 293 fscache_do_drop_object(cache, object, invalidate); 294 295 /* The parent object wants to know when all it dependents have gone */ 296 if (parent) { 297 _debug("release parent OBJ%x {%d}", 298 parent->debug_id, parent->n_children); 299 300 spin_lock(&parent->lock); 301 parent->n_children--; 302 if (parent->n_children == 0) 303 wake_up_var(&parent->n_children); 304 spin_unlock(&parent->lock); 305 object->parent = NULL; 306 fscache_do_put_object(parent, fscache_obj_put_drop_child); 307 } 308 309 fscache_do_put_object(object, fscache_obj_put_drop_obj); 310 fscache_stat(&fscache_n_object_dead); 311 _leave(""); 312 } 313 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org