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 67565C43217 for ; Wed, 9 Mar 2022 17:04:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236967AbiCIRFY (ORCPT ); Wed, 9 Mar 2022 12:05:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237519AbiCIRDC (ORCPT ); Wed, 9 Mar 2022 12:03:02 -0500 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B4601B2ACD; Wed, 9 Mar 2022 08:51:11 -0800 (PST) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 580A91F382; Wed, 9 Mar 2022 16:51:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1646844669; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+ydrdKSlhrPNxyTjqpwFz/lVnyTdgAwQsHL5yVVlnOA=; b=eT82rI/QkvGXelJqBnDXZ6DSfPbxpE/9kD06Wm421Hm28d/zpE1K/K13KnElJN5d398JeQ RonRRpZIKvqzB9DndgVzGEF+km1Drf8ASsp0Z5z3QYRgp3nDF+PHkgDWoDZ0xSUG1Sq9fd +hLU73pHUPEXalYPJ3MNoU06ZwyMbSE= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1646844669; h=from:from:reply-to:reply-to:date:date:message-id:message-id:to:to: cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=+ydrdKSlhrPNxyTjqpwFz/lVnyTdgAwQsHL5yVVlnOA=; b=yLp5xgKJZ2+1DXVn2EKVVMwLVmSTPLl60bWHoe7jQGGzYDxZ+kesslNxqqwqygWh/uLI0o f+LcpnR/hjl7ZWCQ== Received: from ds.suse.cz (ds.suse.cz [10.100.12.205]) by relay2.suse.de (Postfix) with ESMTP id 342BAA3BCC; Wed, 9 Mar 2022 16:51:09 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 9C727DA7DE; Wed, 9 Mar 2022 17:47:13 +0100 (CET) Date: Wed, 9 Mar 2022 17:47:13 +0100 From: David Sterba To: Arnd Bergmann Cc: Masahiro Yamada , alexs@kernel.org, arnd@arndb.de, dsterba@suse.com, elver@google.com, jani.nikula@intel.com, linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, mark.rutland@arm.com, ndesaulniers@google.com, ojeda@kernel.org, torvalds@linux-foundation.org Subject: Re: [PATCH 1/4] [v4] Kbuild: add -Wno-shift-negative-value where -Wextra is used Message-ID: <20220309164713.GX12643@suse.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Arnd Bergmann , Masahiro Yamada , alexs@kernel.org, arnd@arndb.de, dsterba@suse.com, elver@google.com, jani.nikula@intel.com, linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, mark.rutland@arm.com, ndesaulniers@google.com, ojeda@kernel.org, torvalds@linux-foundation.org References: <20220308215615.14183-1-arnd@kernel.org> <20220308215615.14183-2-arnd@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220308215615.14183-2-arnd@kernel.org> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 08, 2022 at 10:56:12PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > As a preparation for moving to -std=gnu11, turn off the > -Wshift-negative-value option. This warning is enabled by gcc when > building with -Wextra for c99 or higher, but not for c89. Since > the kernel already relies on well-defined overflow behavior, > the warning is not helpful and can simply be disabled in > all locations that use -Wextra. > > Signed-off-by: Arnd Bergmann > --- > [v4] > split into a separate patch > --- > drivers/gpu/drm/i915/Makefile | 1 + > drivers/staging/greybus/tools/Makefile | 3 ++- For > fs/btrfs/Makefile | 1 + Acked-by: David Sterba