linux kernel interrupt

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

static int irq;
char *interface;
static irqreturn_t myirq_handler(int irq,void *dev);

static int __init myirq_init(void)
{
printk(“the module is working!/n”);
printk(“the irq is ready for working!/n”);
if(request_irq(irq,myirq_handler,IRQF_SHARED,interface,&irq)){
printk(KERN_ERR “%s interrrupt can’t register %d IRQ /n”,interface,irq);
return -EIO;
}
printk("%s request %d IRQ/n",interface,irq);
return 0;
}
static irqreturn_t myirq_handler(int irq,void *dev)
{
printk("%d IRQ is working/n",irq);
return IRQ_NONE;
}
static void __exit myirq_exit(void)
{
printk(“the module is leaving!/n”);
printk(“the irq is bye bye!/n”);
free_irq(irq,&irq);
printk("%s interrupt free %d IRQ/n",interface,irq);

}
module_init(myirq_init);
module_exit(myirq_exit);
module_param(interface,charp,0644);
module_param(irq,int,0644);
MODULE_LICENSE(“GPL”);

makefile

obj-m:=tiger.o
CURRENT_PATH:=$(shellpwd)VERSIO{N}_{N}UM:=$(shell uname -r)
LINUX_PATH:=/usr/src/linux-headers-$(VERSION_NUM)

all :
make -C $(LINU{X}_{P}ATH)M=$(CURRENT_PATH) modules
clean:
make -C $\left(LINU{X}_{P}ATH\right)M=$(CURRENT_PATH) clean