From c0a00ad5e51d24238f29736d7ece69a84aef6394 Mon Sep 17 00:00:00 2001
From: sbosse <sbosse@uni-bremen.de>
Date: Mon, 9 Dec 2024 20:43:25 +0100
Subject: [PATCH] Mon  9 Dec 20:40:44 CET 2024

---
 kernel/serial.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/serial.h b/kernel/serial.h
index 955a4f7..cfaad95 100644
--- a/kernel/serial.h
+++ b/kernel/serial.h
@@ -9,7 +9,8 @@ See the file LICENSE for details.
 
 void serial_init();
 
-char serial_read(int port_no);
+int serial_read(int port_no);
+int serial_read_nonblock(int port_no);
 void serial_write(int port_no, char a);
 
 int serial_device_probe( int unit, int *blocksize, int *nblocks, char *info );