From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755587Ab1ACSFR (ORCPT ); Mon, 3 Jan 2011 13:05:17 -0500 Received: from mga01.intel.com ([192.55.52.88]:15712 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753380Ab1ACSFP (ORCPT ); Mon, 3 Jan 2011 13:05:15 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.60,267,1291622400"; d="scan'208";a="874033157" Message-ID: <4D220FDB.4090000@linux.intel.com> Date: Mon, 03 Jan 2011 10:05:15 -0800 From: "H. Peter Anvin" Organization: Intel Open Source Technology Center User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Thunderbird/3.1.7 MIME-Version: 1.0 To: Sebastian Andrzej Siewior CC: Grant Likely , sodaville@linutronix.de, devicetree-discuss@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [sodaville] [PATCH 02/15] x86: Add device tree support References: <1292600033-12271-1-git-send-email-bigeasy@linutronix.de> <1292600033-12271-3-git-send-email-bigeasy@linutronix.de> <20101230084311.GD11721@angua.secretlab.ca> <4D21BF17.6090209@linutronix.de> In-Reply-To: <4D21BF17.6090209@linutronix.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/03/2011 04:20 AM, Sebastian Andrzej Siewior wrote: > Grant Likely wrote: >>> +extern char cmd_line[COMMAND_LINE_SIZE]; >>> +/* This number is used when no interrupt has been assigned */ >>> +#define NO_IRQ (-1) >> >> 0 means NO_IRQ on x86 and most architectures. I will change this when >> I pick up the patch. > > cat /proc/interrupts > CPU0 > 0: 40 IO-APIC-edge timer > 0 for the timer is special. However, Linus has declared that NO_IRQ is to be zero, and that only very special interrupts like the PIT timer are allowed to break that. -hpa