[PATCH] make cfq_exit_queue() prune the cfq_io_context for that queue

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e19cb63..80518f7 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -69,6 +69,8 @@
 	unsigned long ttime_samples;
 	unsigned long ttime_mean;
 
+	struct list_head queue_list;
+
 	void (*dtor)(struct cfq_io_context *);
 	void (*exit)(struct cfq_io_context *);
 };