1. 根目录:
2. arch
3. sparc
4. include
5. asm
6. nmi.h

#ifndef __NMI_H
#define __NMI_H

extern int __init nmi_init(void);
extern void perfctr_irq(int irq, struct pt_regs *regs);
extern void nmi_adjust_hz(unsigned int new_hz);

extern atomic_t nmi_active;

extern void start_nmi_watchdog(void *unused);
extern void stop_nmi_watchdog(void *unused);

#endif /* __NMI_H */