linux arm 中断嵌套

#include <linux/interrupt.h>
#include <linux/kernel.h>

irqreturn_t my_interrupt_handler(int irq, void *dev_id) {
    // 中断处理逻辑
    printk(KERN_INFO "Interrupt occurred!\n");
    
    // 返回值表示中断是否已处理
    return IRQ_HANDLED;
}

static int __init my_init(void) {
    int ret;
    
    // 注册中断处理程序
    ret = request_irq(irq_number, my_interrupt_handler, IRQF_SHARED, "my_irq", NULL);
    if (ret) {
        printk(KERN_ERR "Failed to register interrupt handler\n");
        return ret;
    }
    
    printk(KERN_INFO "Interrupt handler registered successfully\n");
    return 0;
}

static void __exit my_exit(void) {
    // 注销中断处理程序
    free_irq(irq_number, NULL);
    printk(KERN_INFO "Interrupt handler unregistered\n");
}

module_init(my_init);
module_exit(my_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("A simple interrupt handler example");