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

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Message-ID: <489B3B01.9080209@zytor.com>
Date:	Thu, 07 Aug 2008 11:12:17 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Yinghai Lu <yhlu.kernel@...il.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	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

Yinghai Lu wrote:
> 
> #ifndef CONFIG_HAVE_SPARSE_IRQ
> #define   valid_irq(irq)          ((irq) > 0 && (irq) < nr_irqs)
> #else
> #define   valid_irq(irq)          ((irq) > 0)
> 
> anyway why 0 is invalid instead of -1U...?
> 

Because 0 is easier to understand to a user when specifying in a module 
option.

	-hpa
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