uv_setup_irq
extern int uv_setup_irq(char *, int, int, unsigned long, int);
EXPORT_SYMBOL_GPL(uv_setup_irq);
irq = uv_setup_irq(irq_name, cpu, blade, mmr, UV_AFFINITY_CPU);
mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset,