#include <linux/module.h>#include <linux/sched.h>#include <linux/rtl.h>#include <asm/io.h>#include <linux/cons.h>#include "common.h"static int output;void intr_handler(int irq, void *id, struct pt_regs *regs) {	outb(output, LPT_PORT);	output = !output;}int init_module(void){	request_irq(LPT_IRQ, intr_handler, SA_INTERRUPT, "lpt", NULL);	outb_p(0x10, LPT_PORT + 2);	output = 0;	return 0;} void cleanup_module(void){	free_irq(LPT_IRQ, NULL);}