hardirq.h
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#ifndef __ASM_HARDIRQ_H
#define __ASM_HARDIRQ_H
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/irq.h>
#include <asm/pda.h>
#include <asm/apic.h>
#define __ARCH_IRQ_STAT 1
/* Generate a lvalue for a pda member. Should fix softirq.c instead to use
special access macros. This would generate better code. */
#define __IRQ_STAT(cpu,member) (read_pda(me)->member)
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
* each architecture has to answer this themselves.
*/
static inline void ack_bad_irq(unsigned int irq)
{
printk("unexpected IRQ trap at vector %02x\n", irq);
#ifdef CONFIG_X86_LOCAL_APIC
/*
* Currently unexpected vectors happen only on SMP and APIC.
* We _must_ ack these because every local APIC has only N
* irq slots per priority level, and a 'hanging, unacked' IRQ
* holds up an irq slot - in excessive cases (when multiple
* unexpected vectors occur) that might lock up the APIC
* completely.
*/
ack_APIC_irq();
#endif
}
#endif /* __ASM_HARDIRQ_H */