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From: John Baldwin <jhb@FreeBSD.org>
Date: Thu, 28 Apr 2011 17:36:26 +0000 (UTC)
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Subject: svn commit: r221176 - head/sys/fs/ext2fs
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Author: jhb
Date: Thu Apr 28 17:36:26 2011
New Revision: 221176
URL: http://svn.freebsd.org/changeset/base/221176

Log:
  The b_dep field of buffers is always empty for ext2fs, it is only used
  for SU in FFS.
  
  Reported by:	kib

Modified:
  head/sys/fs/ext2fs/ext2_readwrite.c

Modified: head/sys/fs/ext2fs/ext2_readwrite.c
==============================================================================
--- head/sys/fs/ext2fs/ext2_readwrite.c	Thu Apr 28 16:29:19 2011	(r221175)
+++ head/sys/fs/ext2fs/ext2_readwrite.c	Thu Apr 28 17:36:26 2011	(r221176)
@@ -162,8 +162,7 @@ READ(ap)
 		if (error)
 			break;
 
-		if ((ioflag & (IO_VMIO|IO_DIRECT)) &&
-		   (LIST_FIRST(&bp->b_dep) == NULL)) {
+		if (ioflag & (IO_VMIO|IO_DIRECT)) {
 			/*
 			 * If there are no dependencies, and it's VMIO,
 			 * then we don't need the buf, mark it available
@@ -189,8 +188,7 @@ READ(ap)
 	 * so it must have come from a 'break' statement
 	 */
 	if (bp != NULL) {
-		if ((ioflag & (IO_VMIO|IO_DIRECT)) &&
-		   (LIST_FIRST(&bp->b_dep) == NULL)) {
+		if (ioflag & (IO_VMIO|IO_DIRECT)) {
 			bp->b_flags |= B_RELBUF;
 			brelse(bp);
 		} else {
@@ -319,8 +317,7 @@ WRITE(ap)
 
 		error =
 		    uiomove((char *)bp->b_data + blkoffset, (int)xfersize, uio);
-		if ((ioflag & (IO_VMIO|IO_DIRECT)) &&
-		   (LIST_EMPTY(&bp->b_dep))) {	/* in ext2fs? */
+		if (ioflag & (IO_VMIO|IO_DIRECT)) {
 			bp->b_flags |= B_RELBUF;
 		}