1. 根目录:
2. arch
3. m68k
4. include
5. asm
6. hardirq.h

#ifndef __M68K_HARDIRQ_H
#define __M68K_HARDIRQ_H

#include <linux/threads.h>
#include <linux/cache.h>
#include <asm/irq.h>

#ifdef CONFIG_MMU

static inline void ack_bad_irq(unsigned int irq)
{
	pr_crit("unexpected IRQ trap at vector %02x\n", irq);
}

/* entry.S is sensitive to the offsets of these fields */
typedef struct {
	unsigned int __softirq_pending;
} ____cacheline_aligned irq_cpustat_t;

#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

#else

#include <asm-generic/hardirq.h>

#endif /* !CONFIG_MMU */

#endif