From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D422C48BC2 for ; Thu, 24 Jun 2021 00:19:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E43661289 for ; Thu, 24 Jun 2021 00:19:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229889AbhFXAVr (ORCPT ); Wed, 23 Jun 2021 20:21:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:34902 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229726AbhFXAVp (ORCPT ); Wed, 23 Jun 2021 20:21:45 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 444E060FE9; Thu, 24 Jun 2021 00:19:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624493967; bh=AtqOXuFkUgj4Uw6L34Q2JkL/gHj3bAFNWm5XuAg3J9Y=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=sHaCwDoxOLnGsBg6LMDJfltO7Y5YHW+98bWv6JJlkaLdJwecfSrUBw3l+FPkjkJ18 KtseNH7ayhB9X7G74mQ+8D3Dq9Efq1Y7hYn5CzxMPdUnyAS0989W/24bp7UtsrXVYA 6paBpVPYIalgfoiuqh6XtlVzfui9Ce0p4yHOnoHCjn+QcmIUcseC1Y8l6239tqv4aj 5LSBgMKXbvWtBE9ZLT5xGmqLkYwn2adMuJEDFHgtl0F84VdJGHU0Hz7zLBPOutyV1S OtCzwBxpL3JjIg596m/mGerGzJClzs98BjrgTOS1EIUGNVA3u/R8Dada7yy42mydhJ qhGYQTcHTpcNQ== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 186885C08D8; Wed, 23 Jun 2021 17:19:27 -0700 (PDT) Date: Wed, 23 Jun 2021 17:19:27 -0700 From: "Paul E. McKenney" To: Nick Desaulniers Cc: aneesh.kumar@linux.ibm.com, LKML , Linux Next Mailing List , Stephen Rothwell , Marco Elver , clang-built-linux Subject: Re: Build failure in -next Message-ID: <20210624001927.GS4397@paulmck-ThinkPad-P17-Gen-1> Reply-To: paulmck@kernel.org References: <20210623223015.GA315292@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 23, 2021 at 04:39:11PM -0700, Nick Desaulniers wrote: > On Wed, Jun 23, 2021 at 3:30 PM Paul E. McKenney wrote: > > > > Hello, Aneesh! > > > > Yesterday evening's next-20210622 testing gave me the following > > kernel-build error: > > > > ld: mm/mremap.o: in function `move_huge_pud': > > /home/git/linux-next/mm/mremap.c:372: undefined reference to `__compiletime_assert_395' > > > > Bisection landed on this commit: > > > > 257121c5aabe ("mm/mremap: convert huge PUD move to separate helper") > > > > I have no idea how this commit relates to that error message, but > > reverting this commit on top of next-20210622 really does get rid of > > the problem. > > > > The following reproducer provokes this error: > > > > tools/testing/selftests/rcutorture/bin/kvm.sh --allcpus --torture lock --configs LOCK07 --build-only --kconfig "CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y" --kmake-arg "CC=clang-11" > > > > Run the above command in the top-level directory of your -next source > > tree, and using this compiler: > > > > $ clang-11 -v > > Ubuntu clang version 11.1.0-++20210428103817+1fdec59bffc1-1~exp1~20210428204431.166 > > Target: x86_64-pc-linux-gnu > > > > Thoughts? > > > > Thanx, Paul > > ++beers_owed; for the report and bisection. Also reported > https://lore.kernel.org/lkml/YM0mrZIPM+sWTDHf@Ryzen-9-3900X.localdomain/, > let's chat over there. And thank you for the redirection! Thanx, Paul