genirq: Convert irq_desc.lock to raw_spinlock
[linux-2.6.git] / arch / m32r / kernel / irq.c
1 /*
2  * linux/arch/m32r/kernel/irq.c
3  *
4  *  Copyright (c) 2003, 2004  Hitoshi Yamamoto
5  *  Copyright (c) 2004  Hirokazu Takata <takata at linux-m32r.org>
6  */
7
8 /*
9  *      linux/arch/i386/kernel/irq.c
10  *
11  *      Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
12  *
13  * This file contains the lowest level m32r-specific interrupt
14  * entry and irq statistics code. All the remaining irq logic is
15  * done by the generic kernel/irq/ code and in the
16  * m32r-specific irq controller code.
17  */
18
19 #include <linux/kernel_stat.h>
20 #include <linux/interrupt.h>
21 #include <linux/seq_file.h>
22 #include <linux/module.h>
23 #include <asm/uaccess.h>
24
25 /*
26  * Generic, controller-independent functions:
27  */
28
29 int show_interrupts(struct seq_file *p, void *v)
30 {
31         int i = *(loff_t *) v, j;
32         struct irqaction * action;
33         unsigned long flags;
34
35         if (i == 0) {
36                 seq_printf(p, "           ");
37                 for_each_online_cpu(j)
38                         seq_printf(p, "CPU%d       ",j);
39                 seq_putc(p, '\n');
40         }
41
42         if (i < NR_IRQS) {
43                 raw_spin_lock_irqsave(&irq_desc[i].lock, flags);
44                 action = irq_desc[i].action;
45                 if (!action)
46                         goto skip;
47                 seq_printf(p, "%3d: ",i);
48 #ifndef CONFIG_SMP
49                 seq_printf(p, "%10u ", kstat_irqs(i));
50 #else
51                 for_each_online_cpu(j)
52                         seq_printf(p, "%10u ", kstat_irqs_cpu(i, j));
53 #endif
54                 seq_printf(p, " %14s", irq_desc[i].chip->typename);
55                 seq_printf(p, "  %s", action->name);
56
57                 for (action=action->next; action; action = action->next)
58                         seq_printf(p, ", %s", action->name);
59
60                 seq_putc(p, '\n');
61 skip:
62                 raw_spin_unlock_irqrestore(&irq_desc[i].lock, flags);
63         }
64         return 0;
65 }
66
67 /*
68  * do_IRQ handles all normal device IRQs (the special
69  * SMP cross-CPU interrupts have their own specific
70  * handlers).
71  */
72 asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
73 {
74         struct pt_regs *old_regs;
75         old_regs = set_irq_regs(regs);
76         irq_enter();
77
78 #ifdef CONFIG_DEBUG_STACKOVERFLOW
79         /* FIXME M32R */
80 #endif
81         __do_IRQ(irq);
82         irq_exit();
83         set_irq_regs(old_regs);
84
85         return 1;
86 }