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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 6F17AC31E46 for ; Wed, 12 Jun 2019 14:56:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 50A3120866 for ; Wed, 12 Jun 2019 14:56:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2439767AbfFLO4S (ORCPT ); Wed, 12 Jun 2019 10:56:18 -0400 Received: from www62.your-server.de ([213.133.104.62]:47570 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727121AbfFLO4S (ORCPT ); Wed, 12 Jun 2019 10:56:18 -0400 Received: from [78.46.172.2] (helo=sslproxy05.your-server.de) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1hb4fe-00007v-4O; Wed, 12 Jun 2019 16:56:14 +0200 Received: from [178.199.41.31] (helo=linux.home) by sslproxy05.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1hb4fd-0005or-V5; Wed, 12 Jun 2019 16:56:13 +0200 Subject: Re: [PATCH] bpf/core.c - silence warning messages To: =?UTF-8?Q?Valdis_Kl=c4=93tnieks?= , Alexei Starovoitov Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org References: <29466.1559875167@turing-police> From: Daniel Borkmann Message-ID: Date: Wed, 12 Jun 2019 16:56:13 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <29466.1559875167@turing-police> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.100.3/25478/Wed Jun 12 10:14:54 2019) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 06/07/2019 04:39 AM, Valdis Klētnieks wrote: > Compiling kernel/bpf/core.c with W=1 causes a flood of warnings: > > kernel/bpf/core.c:1198:65: warning: initialized field overwritten [-Woverride-init] > 1198 | #define BPF_INSN_3_TBL(x, y, z) [BPF_##x | BPF_##y | BPF_##z] = true > | ^~~~ > kernel/bpf/core.c:1087:2: note: in expansion of macro 'BPF_INSN_3_TBL' > 1087 | INSN_3(ALU, ADD, X), \ > | ^~~~~~ > kernel/bpf/core.c:1202:3: note: in expansion of macro 'BPF_INSN_MAP' > 1202 | BPF_INSN_MAP(BPF_INSN_2_TBL, BPF_INSN_3_TBL), > | ^~~~~~~~~~~~ > kernel/bpf/core.c:1198:65: note: (near initialization for 'public_insntable[12]') > 1198 | #define BPF_INSN_3_TBL(x, y, z) [BPF_##x | BPF_##y | BPF_##z] = true > | ^~~~ > kernel/bpf/core.c:1087:2: note: in expansion of macro 'BPF_INSN_3_TBL' > 1087 | INSN_3(ALU, ADD, X), \ > | ^~~~~~ > kernel/bpf/core.c:1202:3: note: in expansion of macro 'BPF_INSN_MAP' > 1202 | BPF_INSN_MAP(BPF_INSN_2_TBL, BPF_INSN_3_TBL), > | ^~~~~~~~~~~~ > > 98 copies of the above. > > The attached patch silences the warnings, because we *know* we're overwriting > the default initializer. That leaves bpf/core.c with only 6 other warnings, > which become more visible in comparison. > > Signed-off-by: Valdis Kletnieks Makes sense, applied!