I working with Video4Linux and ImageSensor.  Some drivers I create on 3.8 kernel on Fedora OS know I want to compile on 4.2 kernel.  I have problem with v4l2_subdev_video_ops  -> enum_frameintervals, try_mbus_fmt , s_mbus_fmt  and v4l2_ioctl_ops -> g_chip_ident  because I don't have it in  kernel 4.2  and I don't know which ops will be good replacement.  
Best regards