linux-kernel - Re: [Patch V4 12/42] x86, ioapic: kill static variable nr_irqs

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Date:	Tue, 10 Jun 2014 01:22:12 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Grant Likely <grant.likely@...aro.org>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>, x86@...nel.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tony Luck <tony.luck@...el.com>,
	Joerg Roedel <joro@...tes.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-acpi@...r.kernel.org, Ingo Molnar <mingo@...nel.org>
Subject: Re: [Patch V4 12/42] x86, ioapic: kill static variable nr_irqs_gsi

On Mon, 9 Jun 2014, Jiang Liu wrote:
>  unsigned int arch_dynirq_lower_bound(unsigned int from)
>  {
> -	return from < nr_irqs_gsi ? nr_irqs_gsi : from;
> +	unsigned int min = gsi_top + NR_IRQS_LEGACY;

Why is this gsi_top + NR_IRQ_LEGACY? The legacy interrupts are part of
the gsi space, aren't they?

Thanks,

	tglx
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