}
static DEVICE_ATTR(control, S_IRUGO, show_control, NULL);
-static struct rtc_class_ops ds1672_rtc_ops = {
+static const struct rtc_class_ops ds1672_rtc_ops = {
.read_time = ds1672_rtc_read_time,
.set_time = ds1672_rtc_set_time,
.set_mmss = ds1672_rtc_set_mmss,