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