linux-kernel - [PATCH 08/17] Unionfs: improve debugging in copy_attr

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Date:	Sat, 16 Feb 2008 21:57:17 -0500
From:	Erez Zadok <ezk@...sunysb.edu>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	viro@....linux.org.uk, hch@...radead.org,
	Erez Zadok <ezk@...sunysb.edu>
Subject: [PATCH 08/17] Unionfs: improve debugging in copy_attr_times

Signed-off-by: Erez Zadok <ezk@...sunysb.edu>
---
 fs/unionfs/subr.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/fs/unionfs/subr.c b/fs/unionfs/subr.c
index 68a6280..1a40f63 100644
--- a/fs/unionfs/subr.c
+++ b/fs/unionfs/subr.c
@@ -247,8 +247,14 @@ void unionfs_copy_attr_times(struct inode *upper)
 	int bindex;
 	struct inode *lower;
 
-	if (!upper || ibstart(upper) < 0)
+	if (!upper)
 		return;
+	if (ibstart(upper) < 0) {
+#ifdef CONFIG_UNION_FS_DEBUG
+		WARN_ON(ibstart(upper) < 0);
+#endif /* CONFIG_UNION_FS_DEBUG */
+		return;
+	}
 	for (bindex = ibstart(upper); bindex <= ibend(upper); bindex++) {
 		lower = unionfs_lower_inode_idx(upper, bindex);
 		if (!lower)
-- 
1.5.2.2

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