From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1753286AbdK0T1t (ORCPT <rfc822;w@1wt.eu>);
        Mon, 27 Nov 2017 14:27:49 -0500
Received: from mx1.redhat.com ([209.132.183.28]:37120 "EHLO mx1.redhat.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1751673AbdK0T1r (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Mon, 27 Nov 2017 14:27:47 -0500
Date: Mon, 27 Nov 2017 13:27:43 -0600
From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Sven Joachim <svenjoac@gmx.de>
Cc: Mikulas Patocka <mpatocka@redhat.com>,
        Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@alien8.de>,
        Brian Gerst <brgerst@gmail.com>, Denys Vlasenko <dvlasenk@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Jiri Slaby <jslaby@suse.cz>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>, live-patching@vger.kernel.org,
        linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH] objtool: fix build of 64-bit kernel with 32-bit userspace
Message-ID: <20171127192743.fjhgwq6ayohcnsaz@treble>
References: <alpine.LRH.2.02.1711061812460.18820@file01.intranet.prod.int.rdu2.redhat.com>
 <20171107175539.zkbzaapmok2b7hbb@treble>
 <87r2sjzkxr.fsf@turtle.gmx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <87r2sjzkxr.fsf@turtle.gmx.de>
User-Agent: Mutt/1.6.0.1 (2016-04-01)
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Mon, 27 Nov 2017 19:27:47 +0000 (UTC)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Mon, Nov 27, 2017 at 06:32:48PM +0100, Sven Joachim wrote:
> On 2017-11-07 11:55 -0600, Josh Poimboeuf wrote:
> 
> > [ Adding Ingo to cc because I believe it was his suggestion to hide the
> >   guess unwinder behind CONFIG_EXPERT. ]
> >
> > On Mon, Nov 06, 2017 at 06:27:53PM -0500, Mikulas Patocka wrote:
> >> This patch fixes building of 64-bit kernel on 32-bit userspace (I tested 
> >> it on RHEL-6-i686 and Debian-Sid-x32).
> >
> > Thanks, I'll review the patch.
> 
> Any news on that?  After upgrading to 4.15-rc1 and running
> "make oldconfig" I found out that the kernel would no longer build
> unless I selected CONFIG_UNWINDER_FRAME_POINTER=y.
> 
> ,----
> | $ uname -m
> | x86_64
> | $ dpkg --print-architecture 
> | i386
> `----

Sorry, I was traveling last week and I'm still getting caught up.  I'll
take a look at it this week.

-- 
Josh