[PATCH] xfs: log proper length of superblock

[Eric Sandeen <sandeen@redhat.com>]

xfs_trans_log_buf takes first byte, last byte as args.  In this
case, it should be from 0 to sizeof() - 1.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---

I should have audited everything when I sent the last patch for
this type of error.  hch suggested changing the interface but it's
all pretty grotty and I'm hesitant for now.

I think maybe a new/separate function to take start, len might
make sense so that not every caller needs to be munged into a new
format, because some of the existing callers would then become more
complex...

diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index a08dd8f40346..ac6cdca63e15 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -928,7 +928,7 @@ xfs_log_sb(
 
 	xfs_sb_to_disk(XFS_BUF_TO_SBP(bp), &mp->m_sb);
 	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SB_BUF);
-	xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb));
+	xfs_trans_log_buf(tp, bp, 0, sizeof(struct xfs_dsb) - 1);
 }
 
 /*