From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Wed, 17 Oct 2007 21:35:02 +0000 (-0400)
Subject: Unionfs: don't bother validating dentry if it has no lower branches
X-Git-Tag: unionfs-2.1.7~5
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=b4f40c5c85f66705d700e5daa4c3877913514613;p=unionfs-2.6.25.y.git

Unionfs: don't bother validating dentry if it has no lower branches

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---

diff --git a/fs/unionfs/debug.c b/fs/unionfs/debug.c
index 68692d78580..894bf7cecc0 100644
--- a/fs/unionfs/debug.c
+++ b/fs/unionfs/debug.c
@@ -132,6 +132,9 @@ void __unionfs_check_dentry(const struct dentry *dentry,
 	inode = dentry->d_inode;
 	dstart = dbstart(dentry);
 	dend = dbend(dentry);
+	/* don't check dentry/mnt if no lower branches */
+	if (dstart < 0 && dend < 0)
+		goto check_inode;
 	BUG_ON(dstart > dend);
 
 	if (unlikely((dstart == -1 && dend != -1) ||
@@ -212,6 +215,7 @@ void __unionfs_check_dentry(const struct dentry *dentry,
 		}
 	}
 
+check_inode:
 	/* for inodes now */
 	if (!inode)
 		return;