struct gendisk;
struct buffer_head;
-extern void (*mach_sched_init) (irqreturn_t (*handler)(int, void *, struct pt_regs *));
+extern void (*mach_sched_init) (irq_handler_t handler);
/* machine dependent keyboard functions */
extern int (*mach_keyb_init) (void);
extern int (*mach_kbdrate) (struct kbd_repeat *);