brintos / linux-shallow public Read only

1// SPDX-License-Identifier: GPL-2.02 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(&registration_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(&registration_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}63