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=-14.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 42405C282C8 for ; Mon, 28 Jan 2019 16:09:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1545B2147A for ; Mon, 28 Jan 2019 16:09:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548691746; bh=F95uzW5aA4HOsG1tNEdwlq3ZdENQRrRJosWhBaKlnZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2l8BFRacOByqyZ5B/fvAFUHdk5aZizy7KR6JWTPat5AJ1419rnXQWv3rQJ0nc9Q3q OPJ/CWN6Uf+8xarVk1H1leoPhAkmPZEDYYuSnOUY6bo2nWNGrob6ArHB+QDLWm49LC NVcQAWjlJ1vb/CODB6Uqlp/j3t0a7RcIw+7PrGR4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732538AbfA1QJE (ORCPT ); Mon, 28 Jan 2019 11:09:04 -0500 Received: from mail.kernel.org ([198.145.29.99]:33138 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732523AbfA1QJB (ORCPT ); Mon, 28 Jan 2019 11:09:01 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 230722084A; Mon, 28 Jan 2019 16:08:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548691740; bh=F95uzW5aA4HOsG1tNEdwlq3ZdENQRrRJosWhBaKlnZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jg8G45MjWN9EEk5ZSTZgYcQHFtFdHoXRF8yUl/UqrtgB/czgVbv+MTFy4kz+kZOQZ l95HjHJtdldDqAGJoOGSN+WGO4loVbBRDus4a21mkbiP1CBnl+zlfEmn55rMb0k14B R317owoWli4BK17r0iPvkZOCH5N1rYNuHq+iTh0U= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Nathan Chancellor , Jens Axboe , Sasha Levin Subject: [PATCH AUTOSEL 4.19 202/258] drbd: Avoid Clang warning about pointless switch statment Date: Mon, 28 Jan 2019 10:58:28 -0500 Message-Id: <20190128155924.51521-202-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128155924.51521-1-sashal@kernel.org> References: <20190128155924.51521-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nathan Chancellor [ Upstream commit a52c5a16cf19d8a85831bb1b915a221dd4ffae3c ] There are several warnings from Clang about no case statement matching the constant 0: In file included from drivers/block/drbd/drbd_receiver.c:48: In file included from drivers/block/drbd/drbd_int.h:48: In file included from ./include/linux/drbd_genl_api.h:54: In file included from ./include/linux/genl_magic_struct.h:236: ./include/linux/drbd_genl.h:321:1: warning: no case matching constant switch condition '0' GENL_struct(DRBD_NLA_HELPER, 24, drbd_helper_info, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./include/linux/genl_magic_struct.h:220:10: note: expanded from macro 'GENL_struct' switch (0) { ^ Silence this warning by adding a 'case 0:' statement. Additionally, adjust the alignment of the statements in the ct_assert_unique macro to avoid a checkpatch warning. This solution was originally sent by Arnd Bergmann with a default case statement: https://lore.kernel.org/patchwork/patch/756723/ Link: https://github.com/ClangBuiltLinux/linux/issues/43 Suggested-by: Lars Ellenberg Signed-off-by: Nathan Chancellor Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- include/linux/genl_magic_struct.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/genl_magic_struct.h b/include/linux/genl_magic_struct.h index 5972e4969197..eeae59d3ceb7 100644 --- a/include/linux/genl_magic_struct.h +++ b/include/linux/genl_magic_struct.h @@ -191,6 +191,7 @@ static inline void ct_assert_unique_operations(void) { switch (0) { #include GENL_MAGIC_INCLUDE_FILE + case 0: ; } } @@ -209,6 +210,7 @@ static inline void ct_assert_unique_top_level_attributes(void) { switch (0) { #include GENL_MAGIC_INCLUDE_FILE + case 0: ; } } @@ -218,7 +220,8 @@ static inline void ct_assert_unique_top_level_attributes(void) static inline void ct_assert_unique_ ## s_name ## _attributes(void) \ { \ switch (0) { \ - s_fields \ + s_fields \ + case 0: \ ; \ } \ } -- 2.19.1