--- mach-defpager/default_pager.c	2016-08-17 09:45:39.011400628 -1000
+++ /tmp/default_pager.c	2016-08-17 09:47:05.989170143 -1000
@@ -1920,6 +1920,7 @@
 	 * Put partition back in.
 	 */
 	part->going_away = FALSE;
+	pthread_mutex_unlock(&part->p_lock);
 
 	return KERN_FAILURE;
 }