kernel: write to all registered consoles with printk()

kernel/console.c

@@ -29,11 +29,23 @@ kern_status_t console_unregister(struct console *con)
 	spin_lock_irqsave(&consoles_lock, &flags);
 
 	queue_delete(&consoles, &con->c_list);
-	
+
 	spin_unlock_irqrestore(&consoles_lock, flags);
 	return KERN_OK;
 }
 
+struct queue *get_consoles(unsigned long *flags)
+{
+	spin_lock_irqsave(&consoles_lock, flags);
+	return &consoles;
+}
+
+void put_consoles(struct queue *consoles, unsigned long flags)
+{
+	(void)consoles;
+	spin_unlock_irqrestore(&consoles_lock, flags);
+}
+
 void console_write(struct console *con, const char *s, unsigned int len)
 {
 	if (con->c_write) {