IDT中代表RTC中断的中断号是多少？

可使用以下代码获取 RTC 中断号：

#include <linux/rtc.h>
#include <asm/irq.h>
#include <asm/idtentry.h>

unsigned int rtc_interrupt = -1;
struct idt_desc *rtc_desc_ptr;

rtc_desc_ptr = (struct idt_desc *) irq_desc[RTC_IRQ].handle_irq;

if (rtc_desc_ptr->a != 0x8E || rtc_desc_ptr->c != 0x8E) {
    printk(KERN_ERR "RTC IDT entry is not set up correctly.");
} else {
    rtc_interrupt = rtc_desc_ptr->b & 0xFFFF;
}

printk(KERN_INFO "RTC interrupt number is: %u", rtc_interrupt);