How to pass Pointcloud2 message to PCL smoothing algorithm?

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I am following the ROS PCL tutorials , When I try to implement the Smoothing and normal estimation based on polynomial reconstruction algorithm I get the following error error

C2664: 'void pcl::PCLBase<pointint>::setInputCloud(const boost::shared_ptr<const pcl::pointcloud<pointt="">> &)': cannot convert argument 1 from 'const pcl::PCLPointCloud2ConstPtr' to 'const boost::shared_ptr<const pcl::pointcloud<pointt="">> &'

    with
    [
        PointInT=pcl::PointXYZ,
        PointT=pcl::PointXYZ
    ]
    and
    [
        PointT=pcl::PointXYZ
    ]

How to pass PointCloud2 message to this algorithm?