From mboxrd@z Thu Jan  1 00:00:00 1970
From: Robin Gareus <robin@gareus.org>
Subject: Re: [ANNOUNCE] 3.0-rt1
Date: Sat, 23 Jul 2011 16:52:36 +0200
Message-ID: <4E2AE034.2000105@gareus.org>
References: <alpine.LFD.2.02.1107222203400.2702@ionos> <201107231629.25322.jbe@pengutronix.de>
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Cc: Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-rt-users <linux-rt-users@vger.kernel.org>
To: Juergen Beisert <jbe@pengutronix.de>
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On 07/23/2011 04:29 PM, Juergen Beisert wrote:
> Hi Thomas,
> 
> on ARM (in this case a Samsung S3C2440 based platform) I get:
> 
> kernel/built-in.o: In function `vprintk':
> /home/jb/[...]/linux-3.0/kernel/printk.c:862: undefined reference to `early_vprintk'
> kernel/built-in.o: In function `register_console':
> /home/jb/[...]linux-3.0/kernel/printk.c:1580: undefined reference to `early_console_initialized'
> make[1]: *** [vmlinux] Error 1
> 
> Did I forget something to enable in my kernel config?

I've seen the same error when trying to work around vprintk issue on
i386 with CONFIG_EXPERT=y  CONFIG_EARLY_PRINTK=n

instead of fixing 'printk.c' I've changed 'include/linux/printk.h:95'
 -void early_vprintk(const char *fmt, va_list args);
 +asmlinkage void early_vprintk(const char *fmt, va_list args);

and compiled with CONFIG_EARLY_PRINTK=y. Not sure if that is an option
on ARM.

Herman has reported the latter issue earlier today.

ciao,
robin