linux 内核中断内幕

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

static irqreturn_t my_interrupt_handler(int irq, void *dev_id) {
    printk(KERN_INFO "Interrupt occurred!
");
    // 处理中断事件
    return IRQ_HANDLED;
}

static int __init my_module_init(void) {
    int ret;
    ret = request_irq(IRQ_NUMBER, my_interrupt_handler, IRQF_SHARED, "my_interrupt", NULL);
    if (ret) {
        printk(KERN_ERR "Failed to register IRQ handler
");
        return ret;
    }
    printk(KERN_INFO "Interrupt handler registered
");
    return 0;
}

static void __exit my_module_exit(void) {
    free_irq(IRQ_NUMBER, NULL);
    printk(KERN_INFO "Interrupt handler unregistered
");
}

module_init(my_module_init);
module_exit(my_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("A simple interrupt handler module");