1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/fs.h>
3 #include <linux/init.h>
4 #include <linux/interrupt.h>
5 #include <linux/irqnr.h>
6 #include <linux/proc_fs.h>
7 #include <linux/seq_file.h>
8 
9 /*
10  * /proc/interrupts
11  */
int_seq_start(struct seq_file * f,loff_t * pos)12 static void *int_seq_start(struct seq_file *f, loff_t *pos)
13 {
14 	return (*pos <= nr_irqs) ? pos : NULL;
15 }
16 
int_seq_next(struct seq_file * f,void * v,loff_t * pos)17 static void *int_seq_next(struct seq_file *f, void *v, loff_t *pos)
18 {
19 	(*pos)++;
20 	if (*pos > nr_irqs)
21 		return NULL;
22 	return pos;
23 }
24 
int_seq_stop(struct seq_file * f,void * v)25 static void int_seq_stop(struct seq_file *f, void *v)
26 {
27 	/* Nothing to do */
28 }
29 
30 static const struct seq_operations int_seq_ops = {
31 	.start = int_seq_start,
32 	.next  = int_seq_next,
33 	.stop  = int_seq_stop,
34 	.show  = show_interrupts
35 };
36 
proc_interrupts_init(void)37 static int __init proc_interrupts_init(void)
38 {
39 	proc_create_seq("interrupts", 0, NULL, &int_seq_ops);
40 	return 0;
41 }
42 fs_initcall(proc_interrupts_init);
43