#include <linux/module.h>
#include <linux/kernel.h>
// #include <linux/init.h>
#include <linux/timer.h>

#define DELAY		1000
#define ITERATIONS	5

struct timer_list tl;

void timer_func(unsigned long data)
{
	if (tl.data--)
		mod_timer(&tl, jiffies + DELAY);

	printk(KERN_INFO "Hello world, again with %lu\n", data); 
}

int init_module(void)      
{ 
	printk(KERN_INFO "Hello, world\n"); 

	init_timer(&tl);
	tl.expires = jiffies + DELAY;
	tl.function = timer_func;
	tl.data = ITERATIONS;
	add_timer(&tl);

	return 0; 
}

void cleanup_module(void)  
{ 
	del_timer_sync(&tl);
	printk(KERN_INFO "Goodbye cruel world\n"); 
}