From 45283c43460900d080478973c873339b5db3013e Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sun, 27 Mar 2022 14:47:50 +0200
Subject: kernel/tty: poll only on IRQs, don't burn cycles

---
 src/kernel/arch/i386/tty/tty.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/kernel/arch/i386/tty/tty.c')

diff --git a/src/kernel/arch/i386/tty/tty.c b/src/kernel/arch/i386/tty/tty.c
index f3fecf3..a63c16a 100644
--- a/src/kernel/arch/i386/tty/tty.c
+++ b/src/kernel/arch/i386/tty/tty.c
@@ -19,6 +19,7 @@ void tty_read(char *buf, size_t len) {
 		for (;;) {
 			if (serial_poll_read(&buf[i]))		break;
 			if (keyboard_poll_read(&buf[i]))	break;
+			asm("hlt" ::: "memory");
 		}
 	}
 }
-- 
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