linux-kernel - Re: [PATCH 00/33] dyn_array and nr

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Message-ID: <m18wv9iqn9.fsf@frodo.ebiederm.org>
Date:	Wed, 06 Aug 2008 18:02:18 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"Yinghai Lu" <yhlu.kernel@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Dhaval Giani" <dhaval@...ux.vnet.ibm.com>,
	"Mike Travis" <travis@....com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/33] dyn_array and nr_irqs support v4

Alan Cox <alan@...rguk.ukuu.org.uk> writes:

> A lot of these are range checks so could be replaced by a single
> valid_irq(irq) test.

Yes.  My first impression was that with NR_IRQS dead valid_irq could
easily become. #define valid_irq(irq) ((irq) != 0) However thinking
just a little more since ultimately we will know which irqs have
something hooked up to them we might actually be able to say something
more interesting.  So I guess actually having a valid irq function
makes sense.  Instead of doing the idiomatic if (irq) logic inline.

Eric

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