119 struct console {  struct
121 	void	(*write)(struct console *, const char *, unsigned);  argument
122 	int	(*read)(struct console *, char *, unsigned);  argument
123 	struct tty_driver *(*device)(struct console *, int *);  argument
125 	int	(*setup)(struct console *, char *);  argument
126 	int	(*match)(struct console *, char *name, int idx, char *options);  argument
131 	struct	 console *next;  argument
141 extern struct console *early_console;
144 extern void register_console(struct console *);
145 extern int unregister_console(struct console *);
146 extern struct console *console_drivers;
154 extern void console_stop(struct console *);
155 extern void console_start(struct console *);
157 extern int braille_register_console(struct console *, int index,
159 extern int braille_unregister_console(struct console *);