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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 <sage@newdream.net>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Sage Weil 2010-10-29 15:37:33 -04:00 committed by Chris Mason
parent 050006a753
commit fccdae435c
1 changed files with 4 additions and 4 deletions
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8
fs/btrfs/ioctl.c
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@ -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 */