--- a/lib/kobject.c~a
+++ a/lib/kobject.c
@@ -126,6 +126,8 @@ static void kobj_kset_join(struct kobjec
 
 	kset_get(kobj->kset);
 	spin_lock(&kobj->kset->list_lock);
+	printk("kobj_kset_join:%p\n", kobj);
+	dump_stack();
 	list_add_tail(&kobj->entry, &kobj->kset->list);
 	spin_unlock(&kobj->kset->list_lock);
 }
@@ -751,9 +753,12 @@ struct kobject *kset_find_obj(struct kse
 
 	spin_lock(&kset->list_lock);
 	list_for_each_entry(k, &kset->list, entry) {
-		if (kobject_name(k) && !strcmp(kobject_name(k), name)) {
-			ret = kobject_get(k);
-			break;
+		if (kobject_name(k)) {
+			printk("kset_find_obj:%p\n", k);
+			if (!strcmp(kobject_name(k), name)) {
+				ret = kobject_get(k);
+				break;
+			}
 		}
 	}
 	spin_unlock(&kset->list_lock);