From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Thu, 8 Mar 2007 04:41:30 +0000 (-0800)
Subject: [PATCH] ecryptfs: nested locking annotation
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=908e0a8a265fe8057604a9a30aec3f0be7bb5ebb;p=openwrt%2Fstaging%2Fblogic.git

[PATCH] ecryptfs: nested locking annotation

ecryptfs uses a lock_parent() function, which I hope really locks the parents
and is not abused

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index e62f3fc7241e..1548be26b5e6 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -38,7 +38,7 @@ static struct dentry *lock_parent(struct dentry *dentry)
 	struct dentry *dir;
 
 	dir = dget(dentry->d_parent);
-	mutex_lock(&(dir->d_inode->i_mutex));
+	mutex_lock_nested(&(dir->d_inode->i_mutex), I_MUTEX_PARENT);
 	return dir;
 }