kref_put_lock
kref_put_lock(&zdev->kref, zpci_release_device, &zpci_list_lock);
kref_put_lock(&front->ref, frontbuffer_release,
kref_put_lock(&cfid->refcount, smb2_close_cached_fid, &cfid->cfids->cfid_list_lock);
kref_put_lock(&dom->ref, auth_domain_release, &auth_domain_lock);