[PATCH 1/1] x86: Add config option to setup early serial console

[Mike Travis]

 * Add config option EARLY_SERIAL_CONSOLE to enable early
   printk's to be directed to the serial console.

Based on linux-next

Signed-off-by: Mike Travis <travis@xxxxxxx>
---

---
 arch/x86/Kconfig.debug         |    9 +++++++++
 arch/x86/kernel/early_printk.c |    4 ++++
 2 files changed, 13 insertions(+)

--- linux-2.6-next.orig/arch/x86/Kconfig.debug
+++ linux-2.6-next/arch/x86/Kconfig.debug
@@ -29,6 +29,15 @@ config EARLY_PRINTK
 	  with klogd/syslogd or the X server. You should normally N here,
 	  unless you want to debug such a crash.
 
+config EARLY_SERIAL_CONSOLE
+	bool "Early Serial Console"
+	default m
+	help
+	  Initializes the early console to be the serial port.  The default
+	  is to use the VGA console.
+
+	  This is useful for server systems that do not have a VGA console.
+
 config DEBUG_STACKOVERFLOW
 	bool "Check for stack overflows"
 	depends on DEBUG_KERNEL
--- linux-2.6-next.orig/arch/x86/kernel/early_printk.c
+++ linux-2.6-next/arch/x86/kernel/early_printk.c
@@ -193,7 +193,11 @@ static struct console simnow_console = {
 };
 
 /* Direct interface for emergencies */
+#ifdef CONFIG_EARLY_SERIAL_CONSOLE
+static struct console *early_console = &early_serial_console;
+#else
 static struct console *early_console = &early_vga_console;
+#endif
 static int early_console_initialized;
 
 void early_printk(const char *fmt, ...)

-- 

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