145 struct console {  struct
147 	void	(*write)(struct console *, const char *, unsigned);  argument
148 	int	(*read)(struct console *, char *, unsigned);  argument
149 	struct tty_driver *(*device)(struct console *, int *);  argument
151 	int	(*setup)(struct console *, char *);  argument
152 	int	(*match)(struct console *, char *name, int idx, char *options);  argument
157 	struct	 console *next;  argument
167 extern struct console *early_console;
170 extern void register_console(struct console *);
171 extern int unregister_console(struct console *);
172 extern struct console *console_drivers;
180 extern void console_stop(struct console *);
181 extern void console_start(struct console *);
183 extern int braille_register_console(struct console *, int index,
185 extern int braille_unregister_console(struct console *);