This patch add sysfs support for vc char devices.
Note, Andrew Morton has reported some very strange oopses with this
patch, that I can not reproduce at all. If anyone else also has
problems with this patch, please let me know.
---
drivers/char/vc_screen.c | 10 ++++++++++
drivers/char/vt.c | 3 ++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff -puN drivers/char/vc_screen.c~sysfs-class-10-vc drivers/char/vc_screen.c
--- 25/drivers/char/vc_screen.c~sysfs-class-10-vc 2004-02-09 22:20:05.000000000 -0800
+++ 25-akpm/drivers/char/vc_screen.c 2004-02-09 22:20:05.000000000 -0800
@@ -36,6 +36,7 @@
#include <linux/kbd_kern.h>
#include <linux/console.h>
#include <linux/smp_lock.h>
+#include <linux/device.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
@@ -469,6 +470,8 @@ static struct file_operations vcs_fops =
.open = vcs_open,
};
+static struct class_simple *vc_class;
+
void vcs_make_devfs(struct tty_struct *tty)
{
devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 1),
@@ -477,19 +480,26 @@ void vcs_make_devfs(struct tty_struct *t
devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 129),
S_IFCHR|S_IRUSR|S_IWUSR,
"vcc/a%u", tty->index + 1);
+ class_simple_device_add(vc_class, MKDEV(VCS_MAJOR, tty->index + 1), NULL, "vcs%u", tty->index + 1);
+ class_simple_device_add(vc_class, MKDEV(VCS_MAJOR, tty->index + 129), NULL, "vcsa%u", tty->index + 1);
}
void vcs_remove_devfs(struct tty_struct *tty)
{
devfs_remove("vcc/%u", tty->index + 1);
devfs_remove("vcc/a%u", tty->index + 1);
+ class_simple_device_remove(MKDEV(VCS_MAJOR, tty->index + 1));
+ class_simple_device_remove(MKDEV(VCS_MAJOR, tty->index + 129));
}
int __init vcs_init(void)
{
if (register_chrdev(VCS_MAJOR, "vcs", &vcs_fops))
panic("unable to get major %d for vcs device", VCS_MAJOR);
+ vc_class = class_simple_create(THIS_MODULE, "vc");
devfs_mk_cdev(MKDEV(VCS_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/0");
devfs_mk_cdev(MKDEV(VCS_MAJOR, 128), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/a0");
+ class_simple_device_add(vc_class, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
+ class_simple_device_add(vc_class, MKDEV(VCS_MAJOR, 128), NULL, "vcsa");
return 0;
}
diff -puN drivers/char/vt.c~sysfs-class-10-vc drivers/char/vt.c
--- 25/drivers/char/vt.c~sysfs-class-10-vc 2004-02-09 22:20:05.000000000 -0800
+++ 25-akpm/drivers/char/vt.c 2004-02-09 22:20:05.000000000 -0800
@@ -2578,6 +2578,8 @@ static struct tty_operations con_ops = {
int __init vty_init(void)
{
+ vcs_init();
+
console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
if (!console_driver)
panic("Couldn't allocate console driver\n");
@@ -2605,7 +2607,6 @@ int __init vty_init(void)
#ifdef CONFIG_FRAMEBUFFER_CONSOLE
fb_console_init();
#endif
- vcs_init();
return 0;
}
_