From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [sodaville] [PATCH 02/15] x86: Add device tree support Date: Mon, 03 Jan 2011 10:05:15 -0800 Message-ID: <4D220FDB.4090000@linux.intel.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4D21BF17.6090209@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org To: Sebastian Andrzej Siewior Cc: Grant Likely , sodaville@linutronix.de, devicetree-discuss@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@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