/* * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar * Copyright (C) 2005-2006, Thomas Gleixner, Russell King * * This file contains the dummy interrupt chip implementation */#include <linux/interrupt.h>#include <linux/irq.h> #include "internals.h" /* * What should we do if we get a hw irq event on an illegal vector? * Each architecture has to answer this themself. */static void ack_bad(struct irq_data *data){	struct irq_desc *desc = irq_data_to_desc(data); 	print_irq_desc(data->irq, desc);	ack_bad_irq(data->irq);} /* * NOP functions */static void noop(struct irq_data *data) { } static unsigned int noop_ret(struct irq_data *data){	return 0;} /* * Generic no controller implementation */struct irq_chip no_irq_chip = {	.name		= "none",	.irq_startup	= noop_ret,	.irq_shutdown	= noop,	.irq_enable	= noop,	.irq_disable	= noop,	.irq_ack	= ack_bad,}; /* * Generic dummy implementation which can be used for * real dumb interrupt sources */struct irq_chip dummy_irq_chip = {	.name		= "dummy",	.irq_startup	= noop_ret,	.irq_shutdown	= noop,	.irq_enable	= noop,	.irq_disable	= noop,	.irq_ack	= noop,	.irq_mask	= noop,	.irq_unmask	= noop,};