#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/fs.h>
#include <linux/kdev_t.h>
#include <linux/jiffies.h>
#include <linux/cdev.h>
#include <asm/uaccess.h>
#include <linux/mutex.h>

struct mutex timer;
static struct cdev my_cdev;
dev_t devn;
int maj = 300;
int min = 0;
int count = 1;
char modname[] = "mytimer";
short x[10] = {1,2,3,4,5,6,7,8,9,10};




ssize_t my_read(struct file *file,char *buf,size_t count,loff_t *pos) {

	unsigned long res;
	void *k = (void *)&x;
	void *l = (void *)&x+1;
	void *j = (void *)&x+2;

	mutex_lock(&timer);
	res =    copy_to_user(buf,k,sizeof(short));
	res =    copy_to_user(buf,l,sizeof(short));
	res =    copy_to_user(buf,j,sizeof(short));

	/*    res =  copy_to_user(buf,&x+4,sizeof(short));
	      res =    copy_to_user(buf,&x+5,sizeof(short));
	      res =    copy_to_user(buf,&x+6,sizeof(short));
	      res =    copy_to_user(buf,&x+7,sizeof(short));
	      res =    copy_to_user(buf,&x+8,sizeof(short));
	      res =    copy_to_user(buf,&x+9,sizeof(short));
	 */
	mutex_unlock(&timer);

	return 20;

}


static struct file_operations my_fops = {
	.owner = THIS_MODULE,
	.read = my_read,

};


static int __init my_init(void){
	int ret;
	devn = MKDEV(maj,min);

	ret = register_chrdev_region(devn,count,modname);

	cdev_init(&my_cdev,&my_fops);
	cdev_add(&my_cdev,devn,count);
	mutex_init(&timer);

	printk(KERN_CRIT "Register timer maj = %d\n",maj);




	return 0;
}


static void __exit my_exit(void){

	cdev_del(&my_cdev);
	unregister_chrdev_region(devn,count);
	printk("<1> Bye Bye \n");

}


module_init(my_init);
module_exit(my_exit);
MODULE_LICENSE("Dual BSD/GPL");