linux-kernel - Re: [patch] x86: handle legacy PIC interrupts on all the cpu's

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Message-ID: <20100316053717.GA10765@elte.hu>
Date:	Tue, 16 Mar 2010 06:37:17 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Suresh Siddha <suresh.b.siddha@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [patch] x86: handle legacy PIC interrupts on all the cpu's


* Yinghai Lu <yinghai@...nel.org> wrote:

> On 03/15/2010 03:56 PM, Suresh Siddha wrote:
> > On Mon, 2010-03-15 at 14:51 -0700, Yinghai Lu wrote:
> >>> +	for (irq = 0; irq < legacy_pic->nr_legacy_irqs; irq++)
> >>> +		if (!IO_APIC_IRQ(irq))
> >>> +			per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
> >>
> >> seems those three lines are not needed...
> > 
> > Those are needed for !CONFIG_X86_IO_APIC case.
> > 
> then we can have
> 
> +#ifndef CONFIG_X86_IO_APIC
> +	for (irq = 0; irq < legacy_pic->nr_legacy_irqs; irq++)
> +		per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq;
> +#endif
> 
> then we don't punish most setup with ioapic controller.

Ok - i've simplified the code with the above and have added your Acked-by - is 
that is fine by you?

Thanks,

	Ingo
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