linux-kernel - Re: [BUG 2.6.36] early serial console undefined refs

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Date:	Sat, 23 Oct 2010 10:37:50 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC:	linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [BUG 2.6.36] early serial console undefined refs

On 10/23/2010 07:43 AM, Mathieu Desnoyers wrote:
> Hi,
> 
> Building 2.6.36 fails for me with the following link error (config below).
> I think commit f4ed2877b16e8146427306aea8819adac5c88374 is very likely to be the
> culprit, but given other changes that were done afterward, the fix is not as
> easy as a simple revert.
> 
> Thoughts ?
> 
>   Building modules, stage 2.
>   MODPOST 65 modules
>   LD      arch/x86/boot/setup.elf
> arch/x86/boot/early_serial_console.o: In function `early_serial_init':
> /home/compudj/git/morestable/linux-2.6-lttng/arch/x86/boot/early_serial_console.c:40: undefined reference to `early_serial_base'

your tree may have problem. Did you try clean tree from Linus ?

early_seria_console.c

#include "boot.h"
...
static void early_serial_init(int port, int baud)


and in boot.h, we have
/* early_serial_console.c */
extern int early_serial_base;


Thanks

	Yinghai

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