commit 313e42999dbc0f234ca5909a236f78f082cb43b1
author Tejun Heo <tj@kernel.org> Fri Nov 28 13:32:02 2008 +0900
committer Jens Axboe <jens.axboe@oracle.com> Mon Dec 29 08:28:44 2008 +0100
tree 023ac251809e3926ebc6b6c2174d67f8c4ac535f
parent ba744d5e290055d171c68067259fcc1e2721f542

block: reorganize QUEUE_ORDERED_* constants

Separate out ordering type (drain,) and action masks (preflush,
postflush, fua) from visible ordering mode selectors
(QUEUE_ORDERED_*).  Ordering types are now named QUEUE_ORDERED_BY_*
while action masks are named QUEUE_ORDERED_DO_*.

This change is necessary to add QUEUE_ORDERED_DO_BAR and make it
optional to improve empty barrier implementation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

include/linux/blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e9bb73f..5c92b44 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -523,22 +523,29 @@
 	 * TAG_FLUSH	: ordering by tag w/ pre and post flushes
 	 * TAG_FUA	: ordering by tag w/ pre flush and FUA write
 	 */
-	QUEUE_ORDERED_NONE	= 0x00,
-	QUEUE_ORDERED_DRAIN	= 0x01,
-	QUEUE_ORDERED_TAG	= 0x02,
+	QUEUE_ORDERED_BY_DRAIN		= 0x01,
+	QUEUE_ORDERED_BY_TAG		= 0x02,
+	QUEUE_ORDERED_DO_PREFLUSH	= 0x10,
+	QUEUE_ORDERED_DO_POSTFLUSH	= 0x40,
+	QUEUE_ORDERED_DO_FUA		= 0x80,
 
-	QUEUE_ORDERED_PREFLUSH	= 0x10,
-	QUEUE_ORDERED_POSTFLUSH	= 0x20,
-	QUEUE_ORDERED_FUA	= 0x40,
+	QUEUE_ORDERED_NONE		= 0x00,
 
-	QUEUE_ORDERED_DRAIN_FLUSH = QUEUE_ORDERED_DRAIN |
-			QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH,
-	QUEUE_ORDERED_DRAIN_FUA	= QUEUE_ORDERED_DRAIN |
-			QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA,
-	QUEUE_ORDERED_TAG_FLUSH	= QUEUE_ORDERED_TAG |
-			QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_POSTFLUSH,
-	QUEUE_ORDERED_TAG_FUA	= QUEUE_ORDERED_TAG |
-			QUEUE_ORDERED_PREFLUSH | QUEUE_ORDERED_FUA,
+	QUEUE_ORDERED_DRAIN		= QUEUE_ORDERED_BY_DRAIN,
+	QUEUE_ORDERED_DRAIN_FLUSH	= QUEUE_ORDERED_DRAIN |
+					  QUEUE_ORDERED_DO_PREFLUSH |
+					  QUEUE_ORDERED_DO_POSTFLUSH,
+	QUEUE_ORDERED_DRAIN_FUA		= QUEUE_ORDERED_DRAIN |
+					  QUEUE_ORDERED_DO_PREFLUSH |
+					  QUEUE_ORDERED_DO_FUA,
+
+	QUEUE_ORDERED_TAG		= QUEUE_ORDERED_BY_TAG,
+	QUEUE_ORDERED_TAG_FLUSH		= QUEUE_ORDERED_TAG |
+					  QUEUE_ORDERED_DO_PREFLUSH |
+					  QUEUE_ORDERED_DO_POSTFLUSH,
+	QUEUE_ORDERED_TAG_FUA		= QUEUE_ORDERED_TAG |
+					  QUEUE_ORDERED_DO_PREFLUSH |
+					  QUEUE_ORDERED_DO_FUA,
 
 	/*
 	 * Ordered operation sequence