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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 6529BC433B4 for ; Mon, 12 Apr 2021 08:15:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2ED1D600EF for ; Mon, 12 Apr 2021 08:15:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237185AbhDLIPm (ORCPT ); Mon, 12 Apr 2021 04:15:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:56810 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236973AbhDLIPi (ORCPT ); Mon, 12 Apr 2021 04:15:38 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6F7FB600EF; Mon, 12 Apr 2021 08:15:18 +0000 (UTC) Date: Mon, 12 Apr 2021 09:15:15 +0100 From: Catalin Marinas To: Andrew Morton Cc: Andrey Konovalov , Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Nathan Chancellor , Arnd Bergmann , kasan-dev , Linux Memory Management List , LKML , Linux ARM , wsd_upstream , "moderated list:ARM/Mediatek SoC..." , Walter Wu Subject: Re: [PATCH v4] kasan: remove redundant config option Message-ID: <20210412081515.GB2060@arm.com> References: <20210226012531.29231-1-walter-zh.wu@mediatek.com> <20210330223637.f3c73a78c64587e615d26766@linux-foundation.org> <20210411105332.GA23778@arm.com> <20210411150316.d60aa0b5174adf2370538809@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210411150316.d60aa0b5174adf2370538809@linux-foundation.org> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Apr 11, 2021 at 03:03:16PM -0700, Andrew Morton wrote: > On Sun, 11 Apr 2021 11:53:33 +0100 Catalin Marinas wrote: > > On Tue, Mar 30, 2021 at 10:36:37PM -0700, Andrew Morton wrote: > > > On Mon, 29 Mar 2021 16:54:26 +0200 Andrey Konovalov wrote: > > > > Looks like my patch "kasan: fix KASAN_STACK dependency for HW_TAGS" > > > > that was merged into 5.12-rc causes a build time warning: > > > > > > > > include/linux/kasan.h:333:30: warning: 'CONFIG_KASAN_STACK' is not > > > > defined, evaluates to 0 [-Wundef] > > > > #if defined(CONFIG_KASAN) && CONFIG_KASAN_STACK > > > > > > > > The fix for it would either be reverting the patch (which would leave > > > > the initial issue unfixed) or applying this "kasan: remove redundant > > > > config option" patch. > > > > > > > > Would it be possible to send this patch (with the fix-up you have in > > > > mm) for the next 5.12-rc? > > > > > > > > Here are the required tags: > > > > > > > > Fixes: d9b571c885a8 ("kasan: fix KASAN_STACK dependency for HW_TAGS") > > > > Cc: stable@vger.kernel.org > > > > > > Got it, thanks. I updated the changelog to mention the warning fix and > > > moved these ahead for a -rc merge. > > > > Is there a chance this patch makes it into 5.12? I still get the warning > > with the latest Linus' tree (v5.12-rc6-408-g52e44129fba5) when enabling > > KASAN_HW_TAGS. > > Trying. We're still awaiting a tested fix for > https://lkml.kernel.org/r/CA+fCnZf1ABrQg0dsxtoZa9zM1BSbLYq_Xbu+xi9cv8WAZxdC2g@mail.gmail.com Thanks Andrew. I didn't realise it was sent and then dropped. However, we should decouple (or rather reorder) the two patches. There's no functional dependency between removing the redundant config option (a fix for an existing commit) and adding support for KASAN_SW_TAGS with gcc-11, only a conflict in scripts/Makefile.kasan. Walter's original patch applies on top of vanilla 5.12-rc3: https://lkml.kernel.org/r/20210226012531.29231-1-walter-zh.wu@mediatek.com -- Catalin