]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - kernel/irq/dummychip.c
irq: Add EXPORT_SYMBOL_GPL to function of irq generic-chip
[linux-2.6.git] / kernel / irq / dummychip.c
1 /*
2  * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
3  * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
4  *
5  * This file contains the dummy interrupt chip implementation
6  */
7 #include <linux/interrupt.h>
8 #include <linux/irq.h>
9
10 #include "internals.h"
11
12 /*
13  * What should we do if we get a hw irq event on an illegal vector?
14  * Each architecture has to answer this themself.
15  */
16 static void ack_bad(struct irq_data *data)
17 {
18         struct irq_desc *desc = irq_data_to_desc(data);
19
20         print_irq_desc(data->irq, desc);
21         ack_bad_irq(data->irq);
22 }
23
24 /*
25  * NOP functions
26  */
27 static void noop(struct irq_data *data) { }
28
29 static unsigned int noop_ret(struct irq_data *data)
30 {
31         return 0;
32 }
33
34 /*
35  * Generic no controller implementation
36  */
37 struct irq_chip no_irq_chip = {
38         .name           = "none",
39         .irq_startup    = noop_ret,
40         .irq_shutdown   = noop,
41         .irq_enable     = noop,
42         .irq_disable    = noop,
43         .irq_ack        = ack_bad,
44 };
45
46 /*
47  * Generic dummy implementation which can be used for
48  * real dumb interrupt sources
49  */
50 struct irq_chip dummy_irq_chip = {
51         .name           = "dummy",
52         .irq_startup    = noop_ret,
53         .irq_shutdown   = noop,
54         .irq_enable     = noop,
55         .irq_disable    = noop,
56         .irq_ack        = noop,
57         .irq_mask       = noop,
58         .irq_unmask     = noop,
59 };