diff --git a/block/blk.h b/block/blk.h
index 1e675e5..2db8f32 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -116,6 +116,10 @@
 
 int blk_dev_init(void);
 
+void elv_quiesce_start(struct request_queue *q);
+void elv_quiesce_end(struct request_queue *q);
+
+
 /*
  * Return the threshold (number of used requests) at which the queue is
  * considered to be congested.  It include a little hysteresis to keep the