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From: Valerie Aurora on 22 Feb 2010 15:50
This is a one-line debugging patch which is invaluable when working on
the dcache. Can I get a yea or a nay on this so I can drop it if it
will never go in? Thanks,

-VAL

From: Jan Blunck <jblunck(a)suse.de>
Date: Sun, 17 May 2009 17:29:47 -0700

BUG_ON() rehash of an already hashed dentry. For debugging of
dcache-related development.

Signed-off-by: Jan Blunck <jblunck(a)suse.de>
Signed-off-by: Valerie Aurora <vaurora(a)redhat.com>
Cc: Alexander Viro <viro(a)zeniv.linux.org.uk>
---
fs/dcache.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 74da947..3d656ab 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1568,6 +1568,7 @@ void d_rehash(struct dentry * entry)
{
spin_lock(&dcache_lock);
spin_lock(&entry->d_lock);
+ BUG_ON(!d_unhashed(entry));
_d_rehash(entry);
spin_unlock(&entry->d_lock);
spin_unlock(&dcache_lock);
--
1.5.6.5

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