Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/proc_fs.h>
4
5#include "fb_internal.h"
6
7static struct proc_dir_entry *fb_proc_dir_entry;
8
9static void *fb_seq_start(struct seq_file *m, loff_t *pos)
10{
11 mutex_lock(®istration_lock);
12
13 return (*pos < FB_MAX) ? pos : NULL;
14}
15
16static void fb_seq_stop(struct seq_file *m, void *v)
17{
18 mutex_unlock(®istration_lock);
19}
20
21static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
22{
23 (*pos)++;
24
25 return (*pos < FB_MAX) ? pos : NULL;
26}
27
28static int fb_seq_show(struct seq_file *m, void *v)
29{
30 int i = *(loff_t *)v;
31 struct fb_info *fi = registered_fb[i];
32
33 if (fi)
34 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
35
36 return 0;
37}
38
39static const struct seq_operations __maybe_unused fb_proc_seq_ops = {
40 .start = fb_seq_start,
41 .stop = fb_seq_stop,
42 .next = fb_seq_next,
43 .show = fb_seq_show,
44};
45
46int fb_init_procfs(void)
47{
48 struct proc_dir_entry *proc;
49
50 proc = proc_create_seq("fb", 0, NULL, &fb_proc_seq_ops);
51 if (!proc)
52 return -ENOMEM;
53
54 fb_proc_dir_entry = proc;
55
56 return 0;
57}
58
59void fb_cleanup_procfs(void)
60{
61 proc_remove(fb_proc_dir_entry);
62}