Received: by 2002:ac0:a594:0:0:0:0:0 with SMTP id m20-v6csp284097imm; Thu, 10 May 2018 20:40:16 -0700 (PDT) X-Google-Smtp-Source: AB8JxZqrZlR7clMx8nugN1X6n8As9hukgHVom9ydndMSe7FuUkDdL/ycOW1Q8Ede1vUCMRElo4nD X-Received: by 2002:a17:902:8bc4:: with SMTP id r4-v6mr3784027plo.381.1526010016325; Thu, 10 May 2018 20:40:16 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1526010016; cv=none; d=google.com; s=arc-20160816; b=mycknWlN9fAdbqHenouE6ousNaQyjf5UXq1tOsAL2nVCOLI/BxlC3ioGSwkSL/xY1V M8qW9CvymndLMtgyIxPpCzRn/MPhKHZWjFI7h4d1Wnq6iGwmZMlvy7/Wo0+uLnr7I0jh WqKTNklxMFd3SBuhZM4V0p13adyVKBATkEPq9/BasKGparKn0TFXtv6eOuPIaoLduGlr Jlwb0ScysusaEpvbNO/ZHP+GrjH+fqohm0uH68mAJjTn4qJDVQm8RODOoc6Dskx5yIhu UbY0fI5qDVwq5ERGDM05GnPiAPnXD0GXq360/WT0oXd3QcNj4VYXI4e0BxyjAoI1RU7E OVwg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=/EolA4CQRFrpRkO9+djYrfA79fGjwRvJJFZOWuvjwis=; b=HggZIEegRhHsdc6cUxVgsaoYBnUMWTdHTMLffqH6dEQ8le7IWPwAksGA9WwoZgHk0m CjuRgT+8YtiDhuLoLDwaA+FCUdApz5ghoTtDUk/RcAFRkcbj05S23UEefb8X1zipCwkl C/spojEzxSwqloUrYcRy3i4IOeVFGSBNtrF+o8Mt/w9oJqyzO8AaXKf6LUlKiKHNqHpV IlVihg6ydl9SzYJooXIilD8yxDNKGsYhREtYwWvLsBeZtjZ+1scF/qR0cpDSyA8ya6Zv Ji+yTdNbirZajBkdDm7KX7jfPJQ8m9hgGj5vfSsI7ImKyGkIjLC1ItV7xEVu7xDLzxtr yDFQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 5-v6si2177477plx.148.2018.05.10.20.40.01; Thu, 10 May 2018 20:40:16 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752471AbeEKDjz (ORCPT + 99 others); Thu, 10 May 2018 23:39:55 -0400 Received: from mga09.intel.com ([134.134.136.24]:38038 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752033AbeEKDjy (ORCPT ); Thu, 10 May 2018 23:39:54 -0400 X-Amp-Result: UNSCANNABLE X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 May 2018 20:39:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,387,1520924400"; d="scan'208";a="49961736" Received: from xiaofe1x-mobl3.ccr.corp.intel.com (HELO wfg-t540p.sh.intel.com) ([10.254.208.234]) by orsmga003.jf.intel.com with ESMTP; 10 May 2018 20:39:51 -0700 Received: from wfg by wfg-t540p.sh.intel.com with local (Exim 4.89) (envelope-from ) id 1fGyuM-00033s-Co; Fri, 11 May 2018 11:39:50 +0800 Date: Fri, 11 May 2018 11:39:50 +0800 From: Fengguang Wu To: Josh Poimboeuf Cc: linux-kernel@vger.kernel.org, LKP , LKP , Julie Du , Philip Li Subject: Re: cross-compiling a 64-bit kernel on a 32-bit host Message-ID: <20180511033950.ahkey2jnsd5i2gvi@wfg-t540p.sh.intel.com> References: <20180510223619.jwdlle42brksfp4v@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <20180510223619.jwdlle42brksfp4v@treble> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Josh, CC LKP team. On Thu, May 10, 2018 at 05:36:19PM -0500, Josh Poimboeuf wrote: >Hi Fengguang, > >I occasionally get compilation bug reports from people who are >cross-compiling an x86-64 kernel target on an x86-32 host. > >Any chance the 0-day build bot could test that configuration? I think >just building a defconfig would be sufficient. It would help sort out >issues in objtool and other host-built scripts. To do that we'll need to create a new build chroot. Julie/Philip should be able to evaluate the efforts and do the plan. Thanks, Fengguang