Re: 2.6.22-rc1-mm1

["H. Peter Anvin" <hpa@zytor.com>]

young dave wrote:
> Hi,
> 
> kernel booting and stopped in edd.c:read_sector.
> 
> I add debug messages around the two inline assemblly sentence, recompile
> kernel,
> now strange thing happend, the kernel booting directly, but the printf
> messages can't be seen because it's too rapid.
> 
> can we use printk in boot code?

Well, it's spelt "printf", but same thing.  (Since it doesn't take a
logging priority, it seems better to name it printf.)

This implies a miscompile somewhere, *or* that your bios stomps on
registers that gcc expect preserved, and adding printf's disturbs the
register allocation sufficiently.

Could you send me the arch/i386/boot/setup.elf file from the original,
failed, build?

Thanks.

	-hpa