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fb: convert /proc/fb to seq_file interface 

Note: looks like accesses to "registered_fb" are done without any exclusion
so there're none in new proc code, too. This should be fixed in separate
patch.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2008-04-28 02:15:42 -07:00 committed by Linus Torvalds
parent 60c1645dfa
commit 0aa163418e
1 changed files with 44 additions and 19 deletions
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63
drivers/video/fbmem.c
View File

@ -26,6 +26,7 @@
#include <linux/init.h>
#include <linux/linux_logo.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/console.h>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
@ -632,27 +633,51 @@ int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
#endif /* CONFIG_LOGO */
static int fbmem_read_proc(char *buf, char **start, off_t offset,
int len, int *eof, void *private)
static void *fb_seq_start(struct seq_file *m, loff_t *pos)
{
struct fb_info **fi;
int clen;
clen = 0;
for (fi = registered_fb; fi < &registered_fb[FB_MAX] && clen < 4000;
fi++)
if (*fi)
clen += sprintf(buf + clen, "%d %s\n",
(*fi)->node,
(*fi)->fix.id);
*start = buf + offset;
if (clen > offset)
clen -= offset;
else
clen = 0;
return clen < len ? clen : len;
return (*pos < FB_MAX) ? pos : NULL;
}
static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
{
(*pos)++;
return (*pos < FB_MAX) ? pos : NULL;
}
static void fb_seq_stop(struct seq_file *m, void *v)
{
}
static int fb_seq_show(struct seq_file *m, void *v)
{
int i = *(loff_t *)v;
struct fb_info *fi = registered_fb[i];
if (fi)
seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
return 0;
}
static const struct seq_operations proc_fb_seq_ops = {
.start = fb_seq_start,
.next = fb_seq_next,
.stop = fb_seq_stop,
.show = fb_seq_show,
};
static int proc_fb_open(struct inode *inode, struct file *file)
{
return seq_open(file, &proc_fb_seq_ops);
}
static const struct file_operations fb_proc_fops = {
.owner = THIS_MODULE,
.open = proc_fb_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
static ssize_t
fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
@ -1533,7 +1558,7 @@ void fb_set_suspend(struct fb_info *info, int state)
static int __init
fbmem_init(void)
{
create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
proc_create("fb", 0, NULL, &fb_proc_fops);
if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
printk("unable to get major %d for fb devs\n", FB_MAJOR);