Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 9 Mar 2022 17:47:13 +0100
From:   David Sterba <dsterba@suse.cz>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Masahiro Yamada <masahiroy@kernel.org>, 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 <arnd@kernel.org>,
        Masahiro Yamada <masahiroy@kernel.org>, 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

On Tue, Mar 08, 2022 at 10:56:12PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> 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 <arnd@arndb.de>
> ---
> [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 <dsterba@suse.com>