-extern cycle_t clocksource_mmio_readl_up(struct clocksource *);
-extern cycle_t clocksource_mmio_readl_down(struct clocksource *);
-extern cycle_t clocksource_mmio_readw_up(struct clocksource *);
-extern cycle_t clocksource_mmio_readw_down(struct clocksource *);
+extern u64 clocksource_mmio_readl_up(struct clocksource *);
+extern u64 clocksource_mmio_readl_down(struct clocksource *);
+extern u64 clocksource_mmio_readw_up(struct clocksource *);
+extern u64 clocksource_mmio_readw_down(struct clocksource *);