linux-kernel - Re: [patch 08/19] i386: cleanup apic code

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Date:	Fri, 10 Nov 2006 11:16:38 +0100
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Andrew Morton <akpm@...l.org>, LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	John Stultz <johnstul@...ibm.com>, Andi Kleen <ak@...e.de>,
	Roman Zippel <zippel@...ux-m68k.org>
Subject: Re: [patch 08/19] i386: cleanup apic code

On Fri, 2006-11-10 at 11:04 +0100, Arjan van de Ven wrote:
> >  
> >  /*
> >   * Knob to control our willingness to enable the local APIC.
> > + *
> > + * -1=force-disable, +1=force-enable
> 
> mind doing 2 defines for these? Makes things more readable I suspect

Yep.

> > -	return maxlvt;
> > +	return APIC_INTEGRATED(GET_APIC_VERSION(v)) ? GET_APIC_MAXLVT(v) : 2;
> >  }
> 
> why not use lapic_is_integrated() here?

oops.

> > \
> > +	if (cpu_has_tsc)
> > +		apic_printk(APIC_VERBOSE, "..... CPU clock speed is "
> 
> please put "approximated at" or something here; or people will call
> supportlines if they bought a 3.4Ghz processor and this shows 3.39999Ghz

:)

> > +EXPORT_SYMBOL(switch_APIC_timer_to_ipi);
> 
> why is this exported at all? Modules really shouldn't be touching apic
> level details.... 

This is exported for ACPI to handle the C3 stops lapic hell.

	tglx


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