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All cleanup paths lead to btrfs_path_free so path can be defined with
the automatic freeing callback in the following functions:

- btrfs_insert_orphan_item()
- btrfs_del_orphan_item()
Signed-off-by: Leo Martins <loemra.dev@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>