+void mdd_pdo_write_unlock(const struct lu_env *env, struct mdd_object *obj,
+ void *dlh)
+{
+ LASSERT(dlh == pdo_handle);
+}
+
+void mdd_pdo_read_unlock(const struct lu_env *env, struct mdd_object *obj,
+ void *dlh)
+{
+ LASSERT(dlh == pdo_handle);
+}
+
+#else /* !MDD_DISABLE_PDO_LOCK */
+
+#ifdef CONFIG_LOCKDEP
+static struct lock_class_key mdd_pdirop_key;
+
+#define RETIP ((unsigned long)__builtin_return_address(0))
+
+static void mdd_lockdep_init(struct mdd_object *obj)
+{
+ lockdep_set_class_and_name(obj, &mdd_pdirop_key, "pdir");
+}
+
+static void mdd_lockdep_pd_acquire(struct mdd_object *obj,
+ enum mdd_object_role role)
+{
+#ifdef HAVE_LOCK_MAP_ACQUIRE
+ lock_map_acquire(&obj->dep_map);
+#else
+ lock_acquire(&obj->dep_map, role, 0, 1, 2, RETIP);
+#endif
+}
+
+static void mdd_lockdep_pd_release(struct mdd_object *obj)
+{
+#ifdef HAVE_LOCK_MAP_ACQUIRE
+ lock_map_release(&obj->dep_map);
+#else
+ lock_release(&obj->dep_map, 0, RETIP);
+#endif
+}
+
+#else /* !CONFIG_LOCKDEP */
+
+static void mdd_lockdep_init(struct mdd_object *obj)
+{}
+static void mdd_lockdep_pd_acquire(struct mdd_object *obj,
+ enum mdd_object_role role)
+{}
+static void mdd_lockdep_pd_release(struct mdd_object *obj)
+{}
+
+#endif /* !CONFIG_LOCKDEP */
+
+void mdd_pdlock_init(struct mdd_object *obj)
+{
+ dynlock_init(&obj->mod_pdlock);
+ mdd_lockdep_init(obj);
+}
+
+void *mdd_pdo_write_lock(const struct lu_env *env, struct mdd_object *obj,
+ const char *name, enum mdd_object_role role)