linux-kernel - [PATCH] x86, setup: Check early serial console per string instead of one char

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Message-ID: <4CB34E82.8030802@kernel.org>
Date:	Mon, 11 Oct 2010 10:50:58 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86, setup: Check early serial console per string instead
 of one char


Move out serial_putchar() calling out of putchar
Let puts() to call serial_putchar() directly.

So only need to check early_serial_base per string.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 arch/x86/boot/tty.c |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

Index: linux-2.6/arch/x86/boot/tty.c
===================================================================
--- linux-2.6.orig/arch/x86/boot/tty.c
+++ linux-2.6/arch/x86/boot/tty.c
@@ -52,16 +52,22 @@ static void __attribute__((section(".ini
 void __attribute__((section(".inittext"))) putchar(int ch)
 {
 	if (ch == '\n')
-		putchar('\r');	/* \n -> \r\n */
+		bios_putchar('\r');	/* \n -> \r\n */
 
 	bios_putchar(ch);
-
-	if (early_serial_base != 0)
-		serial_putchar(ch);
 }
 
 void __attribute__((section(".inittext"))) puts(const char *str)
 {
+	if (early_serial_base) {
+		const char *s = str;
+		while (*s) {
+			if (*s == '\n')
+				serial_putchar('\r');
+			serial_putchar(*s++);
+		}
+	}
+
 	while (*str)
 		putchar(*str++);
 }
--
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