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Commit fccdae43 authored by Sage Weil's avatar Sage Weil Committed by Chris Mason
Browse files

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: default avatarSage Weil <sage@newdream.net>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 050006a7

fs/btrfs/ioctl.c

+4 −4
Original line number Original line Diff line number Diff line
@@ -1492,11 +1492,11 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, 
	path->reada = 2;

	path->reada = 2;





	if (inode < src) {

	if (inode < src) {

		mutex_lock(&inode->i_mutex);

		mutex_lock_nested(&inode->i_mutex, I_MUTEX_PARENT);

		mutex_lock(&src->i_mutex);

		mutex_lock_nested(&src->i_mutex, I_MUTEX_CHILD);

	} else {

	} else {

		mutex_lock(&src->i_mutex);

		mutex_lock_nested(&src->i_mutex, I_MUTEX_PARENT);

		mutex_lock(&inode->i_mutex);

		mutex_lock_nested(&inode->i_mutex, I_MUTEX_CHILD);

	}

	}





	/* determine range to clone */

	/* determine range to clone */