[XFS] Remove PBF_SYNC buffer flag, unused for some time now.

SGI Modid: xfs-linux:xfs-kern:167442a

fs/xfs/linux/xfs_buf.c

 /*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
@@ -1202,7 +1202,7 @@ pagebuf_iostart(			/* start I/O on a buffer	  */
 	page_buf_t		*pb,	/* buffer to start		  */
 	page_buf_flags_t	flags)	/* PBF_LOCK, PBF_ASYNC, PBF_READ, */
 					/* PBF_WRITE, PBF_DELWRI,	  */
-					/* PBF_SYNC, PBF_DONT_BLOCK	  */
+					/* PBF_DONT_BLOCK		  */
 {
 	int			status = 0;
 
@@ -1210,16 +1210,15 @@ pagebuf_iostart(			/* start I/O on a buffer	  */
 
 	if (flags & PBF_DELWRI) {
 		pb->pb_flags &= ~(PBF_READ | PBF_WRITE | PBF_ASYNC);
-		pb->pb_flags |= flags &
-				(PBF_DELWRI | PBF_ASYNC | PBF_SYNC);
+		pb->pb_flags |= flags & (PBF_DELWRI | PBF_ASYNC);
 		pagebuf_delwri_queue(pb, 1);
 		return status;
 	}
 
-	pb->pb_flags &= ~(PBF_READ | PBF_WRITE | PBF_ASYNC | \
-			PBF_DELWRI | PBF_READ_AHEAD | PBF_RUN_QUEUES);
+	pb->pb_flags &= ~(PBF_READ | PBF_WRITE | PBF_ASYNC | PBF_DELWRI | \
+			PBF_READ_AHEAD | PBF_RUN_QUEUES);
 	pb->pb_flags |= flags & (PBF_READ | PBF_WRITE | PBF_ASYNC | \
-			PBF_SYNC | PBF_READ_AHEAD | PBF_RUN_QUEUES);
+			PBF_READ_AHEAD | PBF_RUN_QUEUES);
 
 	BUG_ON(pb->pb_bn == PAGE_BUF_DADDR_NULL);
 

fs/xfs/linux/xfs_buf.h

 /*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
@@ -76,7 +76,6 @@ typedef enum page_buf_flags_e {		/* pb_flags values */
 	PBF_ASYNC = (1 << 4),   /* initiator will not wait for completion  */
 	PBF_NONE = (1 << 5),    /* buffer not read at all                  */
 	PBF_DELWRI = (1 << 6),  /* buffer has dirty pages                  */
-	PBF_SYNC = (1 << 8),    /* force updates to disk                   */
 	PBF_STALE = (1 << 10),	/* buffer has been staled, do not find it  */
 	PBF_FS_MANAGED = (1 << 11), /* filesystem controls freeing memory  */
 	PBF_FS_DATAIOD = (1 << 12), /* schedule IO completion on fs datad  */
@@ -261,7 +260,7 @@ extern int pagebuf_iostart(		/* start I/O on a buffer	*/
 		page_buf_t *,		/* buffer to start		*/
 		page_buf_flags_t);	/* PBF_LOCK, PBF_ASYNC,		*/
 					/* PBF_READ, PBF_WRITE,		*/
-					/* PBF_DELWRI, PBF_SYNC		*/
+					/* PBF_DELWRI			*/
 
 extern int pagebuf_iorequest(		/* start real I/O		*/
 		page_buf_t *);		/* buffer to convey to device	*/
@@ -356,7 +355,7 @@ extern void pagebuf_trace(
 
 #define XFS_BUF_BFLAGS(x)	((x)->pb_flags)
 #define XFS_BUF_ZEROFLAGS(x)	\
-	((x)->pb_flags &= ~(PBF_READ|PBF_WRITE|PBF_ASYNC|PBF_SYNC|PBF_DELWRI))
+	((x)->pb_flags &= ~(PBF_READ|PBF_WRITE|PBF_ASYNC|PBF_DELWRI))
 
 #define XFS_BUF_STALE(x)	((x)->pb_flags |= XFS_B_STALE)
 #define XFS_BUF_UNSTALE(x)	((x)->pb_flags &= ~XFS_B_STALE)
@@ -559,7 +558,6 @@ static inline int	XFS_bwrite(page_buf_t *pb)
 	int	iowait = (pb->pb_flags & PBF_ASYNC) == 0;
 	int	error = 0;
 
-	pb->pb_flags |= PBF_SYNC;
 	if (!iowait)
 		pb->pb_flags |= PBF_RUN_QUEUES;