下面是代码. 就是想做一个定时器实验...

#include <linux/module.h> /**/
#include <linux/kernel.h> /*printk()*/
#include <linux/fs.h> /*file_operations*/
#include <linux/cdev.h> /*cdev_init() cdev_add()*/
#include <linux/types.h> /*size_t*/
#include <linux/stat.h> /*dev_t*/
#include <linux/timer.h> /*timer_list and timer API*/
#include <linux/slab.h> /*kmalloc() kfree()*/

#define     DEV_NUM 1
#define     NAME "timer"

struct timer_list *timer;
int tmajor;
int tminor;
struct cdev *dev;
int tdelay = 1000;
int count;

void timer_fn(unsigned long data)
{
count++;
printk(KERN_INFO "timer start is already %d sec\n", count);
timer->expires += tdelay;
add_timer(timer);
}

static int topen(struct inode *node, struct file *pfile)
{
return 0;
}

static int trelease(struct inode *node, struct file *pfile)
{
return 0;
}

static ssize_t twrite(struct file *pfile, const char __user *buff, size_t count, loff_t *f_pos)
{
return 0;
}
保存下来一般用kdump就好了，配置下

问题好像出在alloc_chrdev_region

没有初始化