From fccdae435c1b295cca546f23f6f43126a28ffac3 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Fri, 29 Oct 2010 15:37:33 -0400 Subject: [PATCH] Btrfs: fix lockdep warning on clone ioctl I'm no lockdep expert, but this appears to make the lockdep warning go away for the i_mutex locking in the clone ioctl. Signed-off-by: Sage Weil Signed-off-by: Chris Mason --- fs/btrfs/ioctl.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 3fe15e4..93d69b3 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1492,11 +1492,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, path->reada = 2; if (inode < src) { - mutex_lock(&inode->i_mutex); - mutex_lock(&src->i_mutex); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT); + mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD); } else { - mutex_lock(&src->i_mutex); - mutex_lock(&inode->i_mutex); + mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD); } /* determine range to clone */ -- 2.7.4