140 struct console {  struct
142 	void	(*write)(struct console *, const char *, unsigned);  argument
143 	int	(*read)(struct console *, char *, unsigned);  argument
144 	struct tty_driver *(*device)(struct console *, int *);  argument
146 	int	(*setup)(struct console *, char *);  argument
147 	int	(*exit)(struct console *);  argument
148 	int	(*match)(struct console *, char *name, int idx, char *options);  argument
157 	struct	 console *next;  argument
167 extern struct console *early_console;
175 extern void register_console(struct console *);
176 extern int unregister_console(struct console *);
177 extern struct console *console_drivers;
185 extern void console_stop(struct console *);
186 extern void console_start(struct console *);
188 extern int braille_register_console(struct console *, int index,
190 extern int braille_unregister_console(struct console *);