Index: kernel/generic/include/ddi/irq.h
===================================================================
--- kernel/generic/include/ddi/irq.h	(revision 431c4028beb348e60a9c7a784a49e94fb44766cc)
+++ kernel/generic/include/ddi/irq.h	(revision 300f4c4dd43b87fb910ea1cfccdc3280c2bdd2ca)
@@ -81,4 +81,6 @@
 	/** When false, notifications are not sent. */
 	bool notify;
+	/** True if the structure is in irq_uspace_hash_table_table */
+	bool hashed_in;
 	/** Answerbox for notifications. */
 	answerbox_t *answerbox;