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=-7.1 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 828BAC433E2 for ; Tue, 15 Sep 2020 18:43:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 448F020B1F for ; Tue, 15 Sep 2020 18:43:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600195417; bh=ocm/+kwHLCe5rLfG41L7B6G08gLAwLJB4lHGGUavr5w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=wx82E20AQ/nmH2qr3Iiq4ZmXi+en3Bv2aLUfklvZ0xYfHj0/9dlJOC6uKJewInmJN Rr+zpnj6+uEOr7xUbP+PZuXTM66pOlJy4gzzR0umGtPCFh0QJjieol07N+xdnB+I+8 3t1tfydc15pPUyscvfsjBMLZXKbKNCemsVobBNTs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727559AbgIOSmw (ORCPT ); Tue, 15 Sep 2020 14:42:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:56838 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727917AbgIORfm (ORCPT ); Tue, 15 Sep 2020 13:35:42 -0400 Received: from localhost (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 53383206E6; Tue, 15 Sep 2020 17:35:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600191340; bh=ocm/+kwHLCe5rLfG41L7B6G08gLAwLJB4lHGGUavr5w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=soU+GhDKnsdGI90q+/ZkhEaYdFuaCkLGz1miLhNYyGwN7POODe8AuGidQMOukKMXq zIJAiP6l+sg8iu3mTAHuGKoR/2LEdr7NNaKzlqnLoUKOHN2WtXWqoEwvOFIHSKItoe NtkGg9jL8bWUgz/bbpZLWLHBnStfGZwaS6JOe8co= Date: Tue, 15 Sep 2020 13:35:39 -0400 From: Sasha Levin To: Linus Torvalds Cc: Greg Kroah-Hartman , Linux Kernel Mailing List , stable , Colin Ian King , Leon Romanovsky Subject: Re: [PATCH 5.8 108/177] gcov: Disable gcov build with GCC 10 Message-ID: <20200915173539.GE2431@sasha-vm> References: <20200915140653.610388773@linuxfoundation.org> <20200915140658.820608455@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Sep 15, 2020 at 10:24:25AM -0700, Linus Torvalds wrote: >On Tue, Sep 15, 2020 at 7:28 AM Greg Kroah-Hartman > wrote: >> >> GCOV built with GCC 10 doesn't initialize n_function variable. This >> produces different kernel panics as was seen by Colin in Ubuntu and me >> in FC 32. >> >> As a workaround, let's disable GCOV build for broken GCC 10 version. > >Oh, Peter Oberparleiter actually figured out what was wrong, and we >have commit 40249c696207 ("gcov: add support for GCC 10.1") upstream >that enables it again with the fix for the changed semantics in >gcc-10. AUTOSEL spotted it (https://lore.kernel.org/stable/20200914130358.1804194-27-sashal@kernel.org/), and I didn't want to rush it in given it doesn't have a fixes/stable tag. I'll queue it up for this cycle as you've pointed it out. -- Thanks, Sasha