apic_bind_intr
irqptr->airq_cpu = apic_bind_intr(dip, irqno, ioapic, ipin);
cpu = irqptr->airq_cpu = apic_bind_intr(dip, irqno,
irqptr->airq_cpu = apic_bind_intr(dip, irqno, 0xff, 0xff);
extern uint32_t apic_bind_intr(dev_info_t *dip, int irq, uchar_t ioapicid,
irqptr->airq_cpu = apic_bind_intr(dip, irqno, ioapic, ipin);