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Subject: Re: Linux 2.4.12-ac5
From: Robert Love <rml@tech9.net>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: "Udo A. Steinberg" <reality@delusion.de>, Dave Jones <davej@suse.de>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        laughing@shared-source.org
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Date: 22 Oct 2001 04:03:47 -0400
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On Mon, 2001-10-22 at 04:05, Alan Cox wrote:
> > You aren't crazy, it doesn't build here either.  The problem is that
> > fixmap.h only includes those defines if CONFIG_IO_APIC is defined. 
> > Well, I don't have use IO_APIC (I am UP) but I do define
> > CONFIG_X86_APIC.  So it does not compile.
> 
> Ahah that would make sense.

Looking over the code it just seems like some ifdefs need sprinkling...
for the time being I just disabled CONFIG_X86_UP_APIC here.

> > So, the problem is that acpitable.c assumes you have both CONFIG_IO_APIC
> > and CONFIG_X86_APIC declared.  It shouldn't.  Even more important, why
> > is my system compiling acpitable.c now?  I don't compile anything to do
> > with ACPI.  What needs access to the ACPI tables via Mini-ACPI, now?
> 
> It is needed for a small number of certain newer SMP systems, and
> potentially a lot more stuff in the near future.

Can it be made a config setting? "Use ACPI to determine irq routing or
whatever" ... it can even default to on.  One good thing to note is that
it is all init/initdata, but its still a bloat of the kernel image.

	Robert Love

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