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Date: Mon, 23 Jul 2007 14:46:47 +0100
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "jidong xiao" <jidong.xiao@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: What does irq_canonicalize mean?
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On Mon, 23 Jul 2007 21:12:22 +0800
"jidong xiao" <jidong.xiao@gmail.com> wrote:

> I found this function, inside include/asm-i386/irq.h or
> include/asm-x86_64/irq.h,

ISA bus interrupt 2 is remapped to 9 on 16bit PC ISA bus platforms. Thus
the user idea of "IRQ 2" is different to the hardware one