interrupts.c

Go to the documentation of this file.

#include <linux/fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irqnr.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>

/*
 * /proc/interrupts
 */
static void *int_seq_start(struct seq_file *f, loff_t *pos)
{
    return (*pos <= nr_irqs) ? pos : NULL;
}

static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
{
    (*pos)++;
    if (*pos > nr_irqs)
        return NULL;
    return pos;
}

static void int_seq_stop(struct seq_file *f, void *v)
{
    /* Nothing to do */
}

static const struct seq_operations int_seq_ops = {
    .start = int_seq_start,
    .next  = int_seq_next,
    .stop  = int_seq_stop,
    .show  = show_interrupts
};

static int interrupts_open(struct inode *inode, struct file *filp)
{
    return seq_open(filp, &int_seq_ops);
}

static const struct file_operations proc_interrupts_operations = {
    .open       = interrupts_open,
    .read       = seq_read,
    .llseek     = seq_lseek,
    .release    = seq_release,
};

static int __init proc_interrupts_init(void)
{
    proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
    return 0;
}
module_init(proc_interrupts_init);