+ *
+ * \retval 0 if state-transition can proceed
+ * \retval -ve otherwise.
+ */
+static int lov_lock_enqueue_wait(const struct lu_env *env,
+ struct lov_lock *lck,
+ struct cl_lock *sublock)
+{
+ struct cl_lock *lock = lck->lls_cl.cls_lock;
+ struct cl_lock *conflict = sublock->cll_conflict;
+ int result = CLO_REPEAT;
+ ENTRY;
+
+ LASSERT(cl_lock_is_mutexed(lock));
+ LASSERT(cl_lock_is_mutexed(sublock));
+ LASSERT(sublock->cll_state == CLS_QUEUING);
+ LASSERT(conflict != NULL);
+
+ sublock->cll_conflict = NULL;
+ cl_lock_mutex_put(env, lock);
+ cl_lock_mutex_put(env, sublock);
+
+ LASSERT(cl_lock_nr_mutexed(env) == 0);
+
+ cl_lock_mutex_get(env, conflict);
+ cl_lock_cancel(env, conflict);
+ cl_lock_delete(env, conflict);
+ while (conflict->cll_state != CLS_FREEING) {
+ int rc = 0;
+
+ rc = cl_lock_state_wait(env, conflict);
+ if (rc == 0)
+ continue;
+
+ result = lov_subresult(result, rc);
+ break;
+ }
+ cl_lock_mutex_put(env, conflict);
+ lu_ref_del(&conflict->cll_reference, "cancel-wait", sublock);
+ cl_lock_put(env, conflict);
+
+ cl_lock_mutex_get(env, lock);
+ RETURN(result);
+}
+
+/**