linux-kernel - Re: [PATCH 13/14] x86_64 irq: Safely cleanup an irq after moving it.

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Message-ID: <45E178A7.7090403@kolumbus.fi>
Date:	Sun, 25 Feb 2007 13:53:11 +0200
From:	Mika Penttilä <mika.penttila@...umbus.fi>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Zwane Mwaikambo <zwane@...radead.org>,
	Ashok Raj <ashok.raj@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"Lu, Yinghai" <yinghai.lu@....com>,
	Natalie Protasevich <protasnb@...il.com>,
	Andi Kleen <ak@...e.de>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH 13/14] x86_64 irq: Safely cleanup an irq after moving
 it.

Eric W. Biederman wrote:
>   * Vectors 0x20-0x2f are used for ISA interrupts.
>   */
> -#define IRQ0_VECTOR		FIRST_EXTERNAL_VECTOR
> +#define IRQ0_VECTOR		FIRST_EXTERNAL_VECTOR + 0x10
>  #define IRQ1_VECTOR		IRQ0_VECTOR + 1
>  #define IRQ2_VECTOR		IRQ0_VECTOR + 2
>  #define IRQ3_VECTOR		IRQ0_VECTOR + 3
> @@ -82,7 +87,7 @@
>   
I think we have a dependency in i8259.c that irq0 is mapped to vector 0x20.

--Mika

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