linux/kernel/irq/dummychip.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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 <linux/export.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 themselves.
 */
static void ack_bad(struct irq_data *data)
{ … }

/*
 * NOP functions
 */
static void noop(struct irq_data *data) { … }

static unsigned int noop_ret(struct irq_data *data)
{ … }

/*
 * Generic no controller implementation
 */
struct irq_chip no_irq_chip = …;

/*
 * Generic dummy implementation which can be used for
 * real dumb interrupt sources
 */
struct irq_chip dummy_irq_chip = …;
EXPORT_SYMBOL_GPL(…);