1 #include <linux/fs.h>
2 #include <linux/init.h>
3 #include <linux/interrupt.h>
4 #include <linux/irqnr.h>
5 #include <linux/proc_fs.h>
6 #include <linux/seq_file.h>
7
8 /*
9 * /proc/interrupts
10 */
int_seq_start(struct seq_file * f,loff_t * pos)11 static void *int_seq_start(struct seq_file *f, loff_t *pos)
12 {
13 return (*pos <= nr_irqs) ? pos : NULL;
14 }
15
int_seq_next(struct seq_file * f,void * v,loff_t * pos)16 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
17 {
18 (*pos)++;
19 if (*pos > nr_irqs)
20 return NULL;
21 return pos;
22 }
23
int_seq_stop(struct seq_file * f,void * v)24 static void int_seq_stop(struct seq_file *f, void *v)
25 {
26 /* Nothing to do */
27 }
28
29 static const struct seq_operations int_seq_ops = {
30 .start = int_seq_start,
31 .next = int_seq_next,
32 .stop = int_seq_stop,
33 .show = show_interrupts
34 };
35
interrupts_open(struct inode * inode,struct file * filp)36 static int interrupts_open(struct inode *inode, struct file *filp)
37 {
38 return seq_open(filp, &int_seq_ops);
39 }
40
41 static const struct file_operations proc_interrupts_operations = {
42 .open = interrupts_open,
43 .read = seq_read,
44 .llseek = seq_lseek,
45 .release = seq_release,
46 };
47
proc_interrupts_init(void)48 static int __init proc_interrupts_init(void)
49 {
50 proc_create("interrupts", 0, NULL, &proc_interrupts_operations);
51 return 0;
52 }
53 fs_initcall(proc_interrupts_init);
54