+ list_empty(&res->blocked))
+ return 0;
+ return 1;
+}
+
+/* "unused": the lockres has no locks, is not on the dirty list,
+ * has no inflight locks (in the gap between mastery and acquiring
+ * the first lock), and has no bits in its refmap.
+ * truly ready to be freed. */
+int __dlm_lockres_unused(struct dlm_lock_resource *res)
+{
+ if (!__dlm_lockres_has_locks(res) &&
+ (list_empty(&res->dirty) && !(res->state & DLM_LOCK_RES_DIRTY))) {
+ /* try not to scan the bitmap unless the first two
+ * conditions are already true */
+ int bit = find_next_bit(res->refmap, O2NM_MAX_NODES, 0);
+ if (bit >= O2NM_MAX_NODES) {
+ /* since the bit for dlm->node_num is not
+ * set, inflight_locks better be zero */
+ BUG_ON(res->inflight_locks != 0);
+ return 1;
+ }
+ }