--- driver/mxuport/mx-uport.c.orig	2021-09-14 08:49:18.570936486 -0400
+++ driver/mxuport/mx-uport.c	2021-09-14 08:51:19.203266750 -0400
@@ -998,10 +998,14 @@ static void mxuport_break_ctl (struct us
 	}
 
 	return;
 }
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,10,180))
+int tty_check_change(struct tty_struct *tty);
+#endif
+
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,19))        		        
 static void mxuport_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
 #else
 static void mxuport_set_termios (struct usb_serial_port *port, struct termios *old_termios)
 #endif