[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 <[e-mail]>
Cc: Michael Halcrow <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/ecryptfs/inode.c

···
 	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;
 }