jprobe module code

#include <linux/kprobes.h> 
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/interrupt.h>

static irqreturn_t ts_interrupt_probe(int irq, void *dev_id)
{
	printk("KERN_INFO %s: irq = %d\n",__func__, irq);
	jprobe_return();  
	return IRQ_HANDLED;
}

static struct jprobe my_jprobe = {  
        .entry = (kprobe_opcode_t *) ts_interrupt_probe,  
        .kp = {  
               // can not set both addr and symbo_name   
               // either set addr or symbol_name   
               // if not -21 while retured   
               .addr = NULL, //(kprobe_opcode_t *) 0xc04e6e4,   
               .symbol_name = "ft5x0x_ts_interrupt",  
        },  
};

static int __init my_jprobe_init(void)
{
	int ret = 0;  
	printk(KERN_INFO "ts_interrupt_probe jprobe module install...\n");  
	ret = register_jprobe(&my_jprobe);  
	if (ret < 0) {
		printk(KERN_INFO "register_jprobe failed, returned %d\n", ret);  
		return ret;  
	}  
	printk(KERN_INFO "Planted jprobe at %p, handler addr %p\n",  
			my_jprobe.kp.addr, my_jprobe.entry);  
	return ret; 
}
static void __exit my_jprobe_exit(void)
{	
	printk(KERN_INFO "ts_interrupt_probe jprobe module uninstall...\n");  
	unregister_jprobe(&my_jprobe);  
	printk(KERN_INFO "jprobe at %p unregistered\n", my_jprobe.kp.addr);  
}

module_init(my_jprobe_init);
module_exit(my_jprobe_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Jprobe test driver");