#ifndef __ASM_I8253_H__
#define __ASM_I8253_H__
+#include <linux/clockchips.h>
+
extern spinlock_t i8253_lock;
+extern struct clock_event_device *global_clock_event;
+
+/**
+ * pit_interrupt_hook - hook into timer tick
+ * @regs: standard registers from interrupt
+ *
+ * Call the global clock event handler.
+ **/
+static inline void pit_interrupt_hook(void)
+{
+ global_clock_event->event_handler(global_clock_event);
+}
+
#endif /* __ASM_I8253_H__ */