def _vsplitter(version):
    """Kernels from Calxeda are named ...ceph-<sha1>...highbank.
    Kernels that we generate are named ...-g<sha1>.
    This routine finds the text in front of the sha1 that is used by
    need_to_install() to extract information from the kernel name.

    :param version: Name of the kernel
    """
    if version.endswith('highbank'):
        return 'ceph-'
    return '-g'