linux-kernel - Re: [PATCH] Fix compile failure on PA-RISC

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Date:	Sun, 6 May 2012 13:24:13 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Mikulas Patocka <mpatocka@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>, linux-parisc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix compile failure on PA-RISC

> What NO_IRQ problem do you mean? There is
> #define NO_IRQ          (-1)
> in arch/parisc/include/asm/irq.h.

It should be zero ready for us to get rid of it. Aa far as I can tell
pa-risc can just move to 0 without anything breaking. In fact some stuff
like serial port polling on 8250 ports will begin to work if it's done.

> And there are other NO_IRQ definitions in other architectures, some 
> defining it to ((unsigned int)(-1)), some to 0xffffffff, some to INT_MAX, 
> some to (-1) and some to (0).

Yes people are working on removing them all.

Alan
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