irq_domain_alloc_descs
int irq_domain_alloc_descs(int virq, unsigned int nr_irqs, irq_hw_number_t hwirq, int node,
virq = irq_domain_alloc_descs(-1, nr_irqs, 0, NUMA_NO_NODE, NULL);
virq = irq_domain_alloc_descs(-1, 1, 0, NUMA_NO_NODE, affd);
virq = irq_domain_alloc_descs(irq_base, nr_irqs, 0, node,
virq = irq_domain_alloc_descs(-1, 1, hwirq, of_node_to_nid(of_node),