Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753959AbbGIQqO (ORCPT ); Thu, 9 Jul 2015 12:46:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43814 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752207AbbGIQqG (ORCPT ); Thu, 9 Jul 2015 12:46:06 -0400 Message-ID: <559EA54C.4060807@redhat.com> Date: Thu, 09 Jul 2015 11:46:04 -0500 From: Mark Langsdorf User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: Linus Torvalds , Linux Kernel Mailing List , "linux-arm-kernel@lists.infradead.org" , peterz@infradead.org Subject: Re: Build failure on ARM64 for Linux 4.2-rc1 was: Linux 4.2-rc1 References: <559BCC8A.1030708@redhat.com> In-Reply-To: <559BCC8A.1030708@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1547 Lines: 40 On 07/07/2015 07:56 AM, Mark Langsdorf wrote: > On 07/05/2015 03:22 PM, Linus Torvalds wrote: >> It's Sunday, two weeks have passed, and the merge window is closed. I >> just pushed out the tag to the git trees, and tar-balls and patches >> should be mirroring out too. > > I'm seeing a build regression on arm64 for tools/perf. > > On linux-4.1, it builds fine. > > On linux-4.2-rc1, it dies with this relevant message (skipping the > missing defines, etc): > > /home/mlangsdorf/tmp/linux-4.2/include/linux/preempt.h: At top level: > /home/mlangsdorf/tmp/linux-4.2/include/linux/preempt.h:64:25: fatal > error: asm/preempt.h: No such file or directory > #include > > On both versions, arch/arm64/include/generated/asm/preempt.h > exists. I'm guessing something changed in the build system so > that's its not being picked up for 4.2-rc1 but I'm not sure where > to look. Hi Peter, I did a git bisect and it looks like the faulty patch is d72da4a4d973d8a0a0d3c97e7cdebf287fbe3a99, "rbtree: Make lockless searches non-fatal". I can't see why it causes my builds to fail, but if I revert that patch and the related series, then I can build the kernel and build tools/perf successfully. Any insight into a less intensive way of fixing my build would be appreciated. --Mark Langsdorf -- 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/