Index: generic/include/proc/thread.h
===================================================================
--- generic/include/proc/thread.h	(revision 482826d75499a7a92dfbb849934f408e9ae8469b)
+++ generic/include/proc/thread.h	(revision 1ec1fd881ab1eb26a3266e752c23de0e3b38c1eb)
@@ -88,4 +88,5 @@
 	context_t sleep_interruption_context;
 
+	bool sleep_interruptible;		/**< If true, the thread can be interrupted from sleep. */
 	waitq_t *sleep_queue;			/**< Wait queue in which this thread sleeps. */
 	timeout_t sleep_timeout;		/**< Timeout used for timeoutable sleeping.  */