Home » Mailing list archives » linux-kernel » 2008 » June » 23

Re: [patch] x86 supports NO_IRQ convention

!MAILaRCHIVE_VOTE_RePLACE
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
[view in full thread]
From: Alan Cox <alan@...>
To: David Brownell <david-b@...>
Cc: lkml <linux-kernel@...>, Thomas Gleixner <tglx@...>, Ingo Molnar <mingo@...>, <hpa@...>
Subject: Re: [patch] x86 supports NO_IRQ convention
Date: Monday, June 23, 2008 - 10:20 am

On Mon, 23 Jun 2008 04:29:36 -0700
David Brownell <david-b@pacbell.net> wrote:


There are historical reasons for the timer tick (which isn't visible
outside arch code) being 0 on x86.


0 means "no IRQ" in things like dev->irq. Lots of driver code assumes
this and it has been decreed 'correct'.

Alan
--
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Messages in current thread:
[patch] x86 supports NO_IRQ convention, David Brownell, (Sun Jun 22, 10:53 pm)
Re: [patch] x86 supports NO_IRQ convention, Benjamin Herrenschmidt, (Mon Jun 23, 6:42 am)
Re: [patch] x86 supports NO_IRQ convention, David Brownell, (Mon Jun 23, 7:28 am)
Re: [patch] x86 supports NO_IRQ convention, Benjamin Herrenschmidt, (Mon Jun 23, 4:06 pm)
Re: [patch] x86 supports NO_IRQ convention, Alan Cox, (Mon Jun 23, 5:08 am)
Re: [patch] x86 supports NO_IRQ convention, Johannes Stezenbach, (Mon Jun 23, 7:34 am)
Re: [patch] x86 supports NO_IRQ convention, David Brownell, (Mon Jun 23, 7:29 am)
Re: [patch] x86 supports NO_IRQ convention, Alan Cox, (Mon Jun 23, 10:20 am)