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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 789C8C38145 for ; Fri, 2 Sep 2022 14:43:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237022AbiIBOnb (ORCPT ); Fri, 2 Sep 2022 10:43:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236995AbiIBOnJ (ORCPT ); Fri, 2 Sep 2022 10:43:09 -0400 Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B7B77159A7C for ; Fri, 2 Sep 2022 07:04:14 -0700 (PDT) Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id 282CeGbE005773; Fri, 2 Sep 2022 07:40:16 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id 282CeEKR005772; Fri, 2 Sep 2022 07:40:14 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Fri, 2 Sep 2022 07:40:14 -0500 From: Segher Boessenkool To: Christophe Leroy Cc: Nathan Chancellor , Michael Ellerman , kernel test robot , Arnd Bergmann , Tom Rix , "llvm@lists.linux.dev" , Nick Desaulniers , "linux-kernel@vger.kernel.org" , Nicholas Piggin , "patches@lists.linux.dev" , "linuxppc-dev@lists.ozlabs.org" Subject: Re: [PATCH] powerpc/math_emu/efp: Include module.h Message-ID: <20220902124014.GM25951@gate.crashing.org> References: <20220831152014.3501664-1-nathan@kernel.org> <20220901194705.GI25951@gate.crashing.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.4.2.3i Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 02, 2022 at 08:43:49AM +0000, Christophe Leroy wrote: > Le 01/09/2022 à 21:47, Segher Boessenkool a écrit : > > On Thu, Sep 01, 2022 at 05:41:33AM +0000, Christophe Leroy wrote: > >> I think it would be worth a GCC bug report. > > > > We need a stand-alone testcase for this. When you have created one, at > > least 98% of the time you discover the bug is in user code after all. > > > > Which is a very good thing, it means the problem can be fixed simpler, > > cheaper, and a lot faster :-) > > Easy to reproduce with a .c file that has a single line: > > non_existing_macro(xxx); That was fast (and cheap and simple) :-) > Apparently that's due to the -w option in arch/powerpc/math_emu/Makefile: > > ccflags-y = -w > > Was introduced by commit d2b194ed8208 ("powerpc/math-emu: Use kernel > generic math-emu code") > > If I understand correctly it means 'ignore all warnings'. Then it seems > CLANG doesn't honor that request. '-w' Inhibit all warning messages. GCC's initial commit has this already (1992). Segher