Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757609AbcK3SgU (ORCPT ); Wed, 30 Nov 2016 13:36:20 -0500 Received: from mail-io0-f196.google.com ([209.85.223.196]:34023 "EHLO mail-io0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756593AbcK3SgL (ORCPT ); Wed, 30 Nov 2016 13:36:11 -0500 MIME-Version: 1.0 In-Reply-To: <583F1A5A.7040708@redhat.com> References: <20161130172435.GG8563@redhat.com> <583F1A5A.7040708@redhat.com> From: Linus Torvalds Date: Wed, 30 Nov 2016 10:36:05 -0800 X-Google-Sender-Auth: dSPSXRNH0gIb78nhnVgAx_nJyE4 Message-ID: Subject: Re: Odd build breakage in 4.9-rc7 To: Prarit Bhargava Cc: Jarod Wilson , Linux Kernel Mailing List , Tony Luck , zarniwhoop73@googlemail.com, Linux Kbuild mailing list Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 942 Lines: 23 On Wed, Nov 30, 2016 at 10:28 AM, Prarit Bhargava wrote: ]> > In my case I tracked this to commit 3637efb00864 ("x86/mce: Add PCI quirks to > identify Xeons with machine check recovery") which adds the include for > generated/autoksyms.h. Ok, that at least makes some sense. The other blamed commit did not seem to possibly make a difference. > Searching LKML and I came across a report from Ken Moffat from a month ago: > > http://marc.info/?l=linux-kernel&m=147794681124332&w=2 Does a "make clean" get rid of it forever? Or does it come back? If it's a one-time dependency issue that is because some header dependency addition that the automatic dependency generator hadn't caught, that might explain a bisection failure too: once the file happens to get rebuilt (and the dependencies re-done), it starts working even though the "happens to be rebuilt" had nothing to do with the original bug. Linus