3880 static int console_call_setup(struct console *newcon, char *options)  in console_call_setup()  argument
3884 	if (!newcon->setup)  in console_call_setup()
3889 	err = newcon->setup(newcon, options);  in console_call_setup()
3901 static int try_enable_preferred_console(struct console *newcon,  in try_enable_preferred_console()  argument
3915 		if (!newcon->match ||  in try_enable_preferred_console()
3916 		    newcon->match(newcon, c->name, c->index, c->options) != 0) {  in try_enable_preferred_console()
3918 			BUILD_BUG_ON(sizeof(c->name) != sizeof(newcon->name));  in try_enable_preferred_console()
3919 			if (strcmp(c->name, newcon->name) != 0)  in try_enable_preferred_console()
3921 			if (newcon->index >= 0 &&  in try_enable_preferred_console()
3922 			    newcon->index != c->index)  in try_enable_preferred_console()
3924 			if (newcon->index < 0)  in try_enable_preferred_console()
3925 				newcon->index = c->index;  in try_enable_preferred_console()
3927 			if (_braille_register_console(newcon, c))  in try_enable_preferred_console()
3930 			err = console_call_setup(newcon, c->options);  in try_enable_preferred_console()
3934 		newcon->flags |= CON_ENABLED;  in try_enable_preferred_console()
3936 			newcon->flags |= CON_CONSDEV;  in try_enable_preferred_console()
3944 static void try_enable_default_console(struct console *newcon)  in try_enable_default_console()  argument
3946 	if (newcon->index < 0)  in try_enable_default_console()
3947 		newcon->index = 0;  in try_enable_default_console()
3949 	if (console_call_setup(newcon, NULL) != 0)  in try_enable_default_console()
3952 	newcon->flags |= CON_ENABLED;  in try_enable_default_console()
3954 	if (newcon->device)  in try_enable_default_console()
3955 		newcon->flags |= CON_CONSDEV;  in try_enable_default_console()
3959 static u64 get_init_console_seq(struct console *newcon, bool bootcon_registered)  in get_init_console_seq()  argument
3965 	if (newcon->flags & (CON_PRINTBUFFER | CON_BOOT)) {  in get_init_console_seq()
3977 		 * device as @newcon. Since it is not known which boot console  in get_init_console_seq()
4056 void register_console(struct console *newcon)  in register_console()  argument
4058 	bool use_device_lock = (newcon->flags & CON_NBCON) && newcon->write_atomic;  in register_console()
4069 		if (WARN(con == newcon, "console '%s%d' already registered\n",  in register_console()
4081 	if ((newcon->flags & CON_BOOT) && realcon_registered) {  in register_console()
4083 			newcon->name, newcon->index);  in register_console()
4087 	if (newcon->flags & CON_NBCON) {  in register_console()
4092 		if (!nbcon_alloc(newcon))  in register_console()
4111 			try_enable_default_console(newcon);  in register_console()
4116 	err = try_enable_preferred_console(newcon, true);  in register_console()
4120 		err = try_enable_preferred_console(newcon, false);  in register_console()
4127 	if (err == -ENOENT && (newcon->flags & CON_ENABLED))  in register_console()
4131 	if (err || newcon->flags & CON_BRL) {  in register_console()
4132 		if (newcon->flags & CON_NBCON)  in register_console()
4133 			nbcon_free(newcon);  in register_console()
4144 	    ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV)) {  in register_console()
4145 		newcon->flags &= ~CON_PRINTBUFFER;  in register_console()
4148 	newcon->dropped = 0;  in register_console()
4149 	init_seq = get_init_console_seq(newcon, bootcon_registered);  in register_console()
4151 	if (newcon->flags & CON_NBCON) {  in register_console()
4153 		nbcon_seq_force(newcon, init_seq);  in register_console()
4156 		newcon->seq = init_seq;  in register_console()
4159 	if (newcon->flags & CON_BOOT)  in register_console()
4173 		newcon->device_lock(newcon, &flags);  in register_console()
4181 		newcon->flags |= CON_CONSDEV;  in register_console()
4182 		hlist_add_head_rcu(&newcon->node, &console_list);  in register_console()
4184 	} else if (newcon->flags & CON_CONSDEV) {  in register_console()
4187 		hlist_add_head_rcu(&newcon->node, &console_list);  in register_console()
4190 		hlist_add_behind_rcu(&newcon->node, console_list.first);  in register_console()
4201 		newcon->device_unlock(newcon, flags);  in register_console()
4212 	con_printk(KERN_INFO, newcon, "enabled\n");  in register_console()
4214 	    ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) &&  in register_console()