fastcall notrace void smp_apic_timer_interrupt(struct pt_regs *regs)
{
int cpu = smp_processor_id();
/*
* the NMI deadlock-detector uses this.
*/
irq_stat[cpu].apic_timer_irqs++;
trace_special(regs->eip, 0, 0);
/*
* NOTE! We'd better ACK the irq immediately,
* because timer handling can be slow.
*/
ack_APIC_irq();
/*
* update_process_times() expects us to have done irq_enter().
* Besides, if we don't timer interrupts ignore the global
* interrupt lock, which is the WrongThing (tm) to do.
*/
irq_enter();
vst_wakeup(regs, 1);
smp_local_timer_interrupt(regs);
irq_exit();
}
/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
/* high bit used in ret_from_ code */
unsigned vector = ~regs->orig_rax;
unsigned irq;
irq_show_regs_callback(smp_processor_id(), regs);
exit_idle();
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
#ifdef CONFIG_EVENT_TRACE
if (irq == trace_user_trigger_irq)
user_trace_start();
#endif
trace_special(regs->rip, irq, 0);
#ifdef CONFIG_DEBUG_STACKOVERFLOW
stack_overflow_check(regs);
#endif
if (likely(irq < NR_IRQS))
generic_handle_irq(irq);
else {
if (!disable_apic)
ack_APIC_irq();
if (printk_ratelimit())
printk(KERN_EMERG "%s: %d.%d No irq handler for vector\n",
__func__, smp_processor_id(), vector);
}
irq_exit();
set_irq_regs(old_regs);
return 1;
}
/*
* Reschedule call back. Trigger a reschedule pass so that
* RT-overload balancing can pass tasks around.
*/
fastcall notrace void smp_reschedule_interrupt(struct pt_regs *regs)
{
trace_special(regs->eip, 0, 0);
ack_APIC_irq();
set_tsk_need_resched(current);
}
