add sysfs support for vc devices.

drivers/char/vc_screen.c

@@ -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 *tty)
 	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;
 }