Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751464AbaKBHqf (ORCPT ); Sun, 2 Nov 2014 02:46:35 -0500 Received: from mail-wg0-f47.google.com ([74.125.82.47]:64866 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751078AbaKBHqe convert rfc822-to-8bit (ORCPT ); Sun, 2 Nov 2014 02:46:34 -0500 MIME-Version: 1.0 In-Reply-To: <54554DBC.3050607@suse.de> References: <1414454639-7491-1-git-send-email-agraf@suse.de> <20141028084735.6338d01b@lwn.net> <5454CC07.1070605@gmail.com> <54554DBC.3050607@suse.de> From: "Matwey V. Kornilov" Date: Sun, 2 Nov 2014 11:46:09 +0400 Message-ID: Subject: Re: [PATCH] Documentation: Restrict TSC test code to x86 To: Alexander Graf Cc: Jonathan Corbet , Peter Foley , LKML , "linux-doc@vger.kernel.org" , Jiri Kosina , Randy Dunlap , "afaerber@suse.de" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I wish I knew. We need KBuild guru to ask how to take into account host architecture. 2014-11-02 0:16 GMT+03:00 Alexander Graf : > > > On 01.11.14 13:03, Matwey V. Kornilov wrote: >> 28.10.2014 16:12, Alexander Graf пишет: >>> >>> >>> >>>> Am 28.10.2014 um 13:47 schrieb Jonathan Corbet : >>>> >>>> On Mon, 27 Oct 2014 20:07:51 -0400 >>>> Peter Foley wrote: >>>> >>>>>> The prctl test code in Documentation/ tries to show how to >>>>>> use a call that only makes sense on x86. Restrict it there >>>>>> so that other platforms don't try to call asm("rdtsc"). >>>>>> >>>>>> Signed-off-by: Alexander Graf >>>>> >>>>> Acked-by: Peter Foley >>>> >>>> Snagged into the docs tree, thanks. >>> >>> Awesome, please make sure this makes it into 3.18 - the build is broken on non-x86 archs there ;). >>> >>> Alex >>> >> >> Hi, >> >> Sorry for criticism, but the patch is not complete. >> CONFIG_X86 deals with target architecture, at the same time the problem >> deals with the host architecture. >> >> Imagine, that I run arm, aarch64 or something else and do >> cross-compiling kernel for x86 on it. Then CONFIG_X86 will evaluate to >> 'y' and make will try to compile the apps with the host-compiler, which >> is not x86 one. > > Good point. Any ideas how I can easily limit this to x86 hosts? > > > Alex -- With best regards, Matwey V. Kornilov http://blog.matwey.name xmpp://0x2207@jabber.ru -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/