From a1bbde734aa10aafa4d6904ca8c5bb7c6a63b1ae Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@suse.de>
Date: Tue, 11 Jul 2006 21:49:15 +0200
Subject: [PATCH] --- yaml --- r: 37533 b: refs/heads/master c:
 1fbfdfcddff4df188b24d9d05271a76a85064583 h: refs/heads/master i:   37531:
 90c3090a2c8c43d0446ae017bb8597ea044b4de0 v: v3

---
 [refs]                         |  2 +-
 trunk/include/linux/elevator.h | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 8ed98cb1a16b..794b5a51942a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b8aca35af5e9fbc2e41a3ba1b2e66f24e80ca9b6
+refs/heads/master: 1fbfdfcddff4df188b24d9d05271a76a85064583
diff --git a/trunk/include/linux/elevator.h b/trunk/include/linux/elevator.h
index 95b2a04b969c..0e7b1a733919 100644
--- a/trunk/include/linux/elevator.h
+++ b/trunk/include/linux/elevator.h
@@ -166,4 +166,16 @@ enum {
 #define rq_end_sector(rq)	((rq)->sector + (rq)->nr_sectors)
 #define rb_entry_rq(node)	rb_entry((node), struct request, rb_node)
 
+/*
+ * Hack to reuse the donelist list_head as the fifo time holder while
+ * the request is in the io scheduler. Saves an unsigned long in rq.
+ */
+#define rq_fifo_time(rq)	((unsigned long) (rq)->donelist.next)
+#define rq_set_fifo_time(rq,exp)	((rq)->donelist.next = (void *) (exp))
+#define rq_entry_fifo(ptr)	list_entry((ptr), struct request, queuelist)
+#define rq_fifo_clear(rq)	do {		\
+	list_del_init(&(rq)->queuelist);	\
+	INIT_LIST_HEAD(&(rq)->donelist);	\
+	} while (0)
+
 #endif