-#ifdef CONFIG_SMP
-static int irq_choose_cpu(const struct cpumask *mask)
-{
- int cpuid;
-
- if (cpumask_equal(mask, cpu_all_mask)) {
- static int irq_rover = 0;
- static DEFINE_RAW_SPINLOCK(irq_rover_lock);
- unsigned long flags;
-
- /* Round-robin distribution... */
- do_round_robin:
- raw_spin_lock_irqsave(&irq_rover_lock, flags);
-
- irq_rover = cpumask_next(irq_rover, cpu_online_mask);
- if (irq_rover >= nr_cpu_ids)
- irq_rover = cpumask_first(cpu_online_mask);
-
- cpuid = irq_rover;
-
- raw_spin_unlock_irqrestore(&irq_rover_lock, flags);
- } else {
- cpuid = cpumask_first_and(mask, cpu_online_mask);
- if (cpuid >= nr_cpu_ids)
- goto do_round_robin;
- }
-
- return get_hard_smp_processor_id(cpuid);
-}
-#else
-static int irq_choose_cpu(const struct cpumask *mask)
-{
- return hard_smp_processor_id();
-}
-#endif
-