From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hanjun Guo Subject: Re: [PATCH] Documentation / cpu hotplug: remove outdated description for MADT entries Date: Fri, 21 Jun 2013 10:16:14 +0800 Message-ID: <51C3B76E.1090300@linaro.org> References: <1371718482-452-1-git-send-email-hanjun.guo@linaro.org> <3504197.mRYUAZnZ9p@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pb0-f44.google.com ([209.85.160.44]:45951 "EHLO mail-pb0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422877Ab3FUCRO (ORCPT ); Thu, 20 Jun 2013 22:17:14 -0400 Received: by mail-pb0-f44.google.com with SMTP id uo1so7028809pbc.17 for ; Thu, 20 Jun 2013 19:17:13 -0700 (PDT) In-Reply-To: <3504197.mRYUAZnZ9p@vostro.rjw.lan> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: Rob Landley , Rusty Russell , Srivatsa Vaddagiri , linux-acpi@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, patches@linaro.org, linaro-kernel@lists.linaro.org On 2013-6-21 3:52, Rafael J. Wysocki wrote: > On Thursday, June 20, 2013 04:54:42 PM Hanjun Guo wrote: >> More than 256 entries in ACPI MADT is supported from ACPI 3.0 Specification, >> So the outdated description for MADT entries should be removed. > > Well, it kind of is still valid for systems pre-dating ACPI 3.0, isn't it? Yes, it is. > > So perhaps instead of simply removing that information it would be better to > rephrase it? Good idea, I will update my patch and send out soon. Thanks Hanjun > > Thanks, > Rafael > > >> Signed-off-by: Hanjun Guo >> --- >> Documentation/cpu-hotplug.txt | 3 --- >> 1 file changed, 3 deletions(-) >> >> diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt >> index 9f40135..2e36e40 100644 >> --- a/Documentation/cpu-hotplug.txt >> +++ b/Documentation/cpu-hotplug.txt >> @@ -370,9 +370,6 @@ A: There is no clear spec defined way from ACPI that can give us that >> CPUs in MADT as hotpluggable CPUS. In the case there are no disabled CPUS >> we assume 1/2 the number of CPUs currently present can be hotplugged. >> >> - Caveat: Today's ACPI MADT can only provide 256 entries since the apicid field >> - in MADT is only 8 bits. >> - >> User Space Notification >> >> Hotplug support for devices is common in Linux today. Its being used today to >>