linux-kernel – 编写基本键盘中断处理程序,抛出“Unknown key r

8月19日18:59:06 vim内核：[112.485102] atkbd serio0：释放未知密钥(翻译集2,代码0xe0在isa0060 / serio0上).
8月19日18:59:06 vim内核：[112.485108] atkbd serio0：使用’setkeycodes e060’让它知道.

粘贴代码.

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

/* This function services keyboard interrupts */
irq_handler_t irq_handler (int irq,void *dev_id,struct pt_regs *regs) {
  static unsigned char scancode;

  /*
    Read keyboard status
  */
  scancode = inb (0x60);

  if ((scancode == 0x01) || (scancode == 0x81))
    {
      printk ("You pressed Esc !n");
    }
  }

  return (irq_handler_t) IRQ_HANDLED;
}

/* Initialize the module and Register the IRQ handler */
static int __init keybrd_int_register(void)
{
  int result;
  /* Request IRQ 1,the keyboard IRQ */    
  result = request_irq (1,(irq_handler_t) irq_handler,IRQF_SHARED,"keyboard_stats_irq",(void *)(irq_handler));

  if (result)
    printk(KERN_INFO "can't get shared interrupt for keyboardn");

  return result;
}

/* Remove the interrupt handler */
static void __exit keybrd_int_unregister(void) {
  free_irq(1,(void *)(irq_handler)); /* i can't pass NULL,this is a shared interrupt handler! */
}

MODULE_LICENSE ("GPL");
module_init(keybrd_int_register);
module_exit(keybrd_int_unregister);

任何人都可以给我一些线索,为什么这个箭头键停止工作当我插入我的模块并开始工作乳清我删除它们？

我正在虚拟机上运行我的代码.