Linux内核中断模块之中断芯片之附带数据描述

/**
 * struct irq_data - per irq chip data passed down to chip functions
 */
struct irq_data {
 u32   mask;
 unsigned int  irq;
 unsigned long  hwirq;
 struct irq_common_data *common;
 struct irq_chip  *chip;
 struct irq_domain *domain;
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
 struct irq_data  *parent_data;
#endif
 void   *chip_data;
};