+/** flock deadlock detected */
+#define LDLM_FL_FLOCK_DEADLOCK 0x0000000000008000ULL // bit 15
+#define ldlm_is_flock_deadlock(_l) LDLM_TEST_FLAG(( _l), 1ULL << 15)
+#define ldlm_set_flock_deadlock(_l) LDLM_SET_FLAG(( _l), 1ULL << 15)
+#define ldlm_clear_flock_deadlock(_l) LDLM_CLEAR_FLAG((_l), 1ULL << 15)
+