Subject: Re: Would setting the CONFIG_RTC option break the powerpc kernel on your machine ?

From: Ethan Benson <[email-masked]>
Date: Tue, 6 Jan 2004 22:51:51 -0900

On Wed, Jan 07, 2004 at 06:22:25PM +1100, Benjamin Herrenschmidt wrote:
>
> > BTW, i didn't manage to get the generic RTC code working on my
> > pegasos, and i am actually a bit pressed for time.
> >
> > Do you think a workaround, for the debian powerpc packages, would be
> > to add a test for the presence of a pmac in the CONFIG_RTC code, and
> > abort if one is found ?
> >
> > If so, what would be the best way to test for a pmac subarch in the
> > drivers/char/rtc.c code ?
>
> will the kernel let you build both drivers in ?

yes, which will cause all powermacs to hang on bootup when hwclock is run.

> then you can do, in 2.4, something ugly like that:
>
> #ifdef CONFIG_ALL_PPC
> if (_machine == _MACH_Pmac)
> 	return -ENODEV;
> #endif

which im betting will instead cause hwclock to fail on all powermacs
with: hwclock: /dev/rtc: No such device

but i could be missing something obvious with your suggestion.

--
Ethan Benson
http://www.alaska.net/~erbenson/

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