[Midnightbsd-cvs] src [9139] trunk/sys/sys/buf.h: add babarrierwrite

[laffer1 at midnightbsd.org]

Revision: 9139
          http://svnweb.midnightbsd.org/src/?rev=9139
Author:   laffer1
Date:     2016-10-01 22:20:26 -0400 (Sat, 01 Oct 2016)
Log Message:
-----------
add babarrierwrite

Modified Paths:
--------------
    trunk/sys/sys/buf.h

Modified: trunk/sys/sys/buf.h
===================================================================
--- trunk/sys/sys/buf.h	2016-10-02 00:59:55 UTC (rev 9138)
+++ trunk/sys/sys/buf.h	2016-10-02 02:20:26 UTC (rev 9139)
@@ -205,7 +205,7 @@
 #define	B_00000800	0x00000800	/* Available flag. */
 #define	B_00001000	0x00001000	/* Available flag. */
 #define	B_INVAL		0x00002000	/* Does not contain valid info. */
-#define	B_00004000	0x00004000	/* Available flag. */
+#define	B_BARRIER	0x00004000	/* Write this and all preceeding first. */
 #define	B_NOCACHE	0x00008000	/* Do not cache block after use. */
 #define	B_MALLOC	0x00010000	/* malloced b_data */
 #define	B_CLUSTEROK	0x00020000	/* Pagein op, so swap() can count it. */
@@ -491,6 +491,8 @@
 	    struct ucred *, int, struct buf **);
 void	bdwrite(struct buf *);
 void	bawrite(struct buf *);
+void	babarrierwrite(struct buf *);
+int	bbarrierwrite(struct buf *);
 void	bdirty(struct buf *);
 void	bundirty(struct buf *);
 void	bufstrategy(struct bufobj *, struct buf *);