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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465// 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){ 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, .flags = IRQCHIP_SKIP_SET_WAKE,};
/* * 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, .flags = IRQCHIP_SKIP_SET_WAKE,};EXPORT_SYMBOL_GPL(dummy_irq_chip);