From patchwork Mon Nov 15 02:48:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 12618585 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4AA0C433FE for ; Mon, 15 Nov 2021 02:43:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8EEAD61106 for ; Mon, 15 Nov 2021 02:43:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229596AbhKOCqm (ORCPT ); Sun, 14 Nov 2021 21:46:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:60354 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229588AbhKOCqg (ORCPT ); Sun, 14 Nov 2021 21:46:36 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 2405E61106; Mon, 15 Nov 2021 02:43:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1636944221; bh=cNcC+xaVwuBsu4s+TjO1ZeRzoEwUCmGWi+n1A222XYo=; h=Date:From:To:Cc:Subject:From; b=kDNVN7SVyrTX3ImVNFu87j10RlMdvDumEOJaEmuqZ0U56QQWKQP3P5m0DwK5hBX+l 3t3Ly2tK3ZKxd/uSwj4n4fApKakhQiUn2KfU+t6MAG/iVg2NFAD7h8Id4lsnK4nYL0 m5zPRHVfRHRREUq1F/M83pS2wWIxu/Tfq2J72eeu28OgmN+yvAgNWnHMzHsVsiaycI SKKsoQoffgrVN1aPQex2skPC0KFFM1/xuwSQFgtYHuQBWmysTUBy++J2NvRD/hR6CZ q/qp+bXgBXxdUURKn+XVEa/j92GFDKO0t53qbpoSbGAbYoDsmptSaYZpHiNsry7pMH N9/k4QX1n9CuQ== Date: Sun, 14 Nov 2021 20:48:44 -0600 From: "Gustavo A. R. Silva" To: Linus Torvalds Cc: Nathan Chancellor , linux-kernel@vger.kernel.org, "Gustavo A. R. Silva" , linux-hardening@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: [PATCH v3] kbuild: Fix -Wimplicit-fallthrough=5 error for GCC 5.x and 6.x Message-ID: <20211115024844.GA68591@embeddedor> MIME-Version: 1.0 Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-hardening@vger.kernel.org -Wimplicit-fallthrough=5 was under cc-option because it was only available in GCC 7.x and newer so the build is now broken for GCC 5.x and 6.x: gcc: error: unrecognized command line option '-Wimplicit-fallthrough=5'; did you mean '-Wno-fallthrough'? Fix this by moving -Wimplicit-fallthrough=5 under cc-option. Fixes: dee2b702bcf0 ("kconfig: Add support for -Wimplicit-fallthrough") Reported-by: Nathan Chancellor Co-developed-by: Nathan Chancellor Signed-off-by: Nathan Chancellor Signed-off-by: Gustavo A. R. Silva --- Changes in v3: - Keep the original CC_IS_GCC part of the test[1]. Link: https://lore.kernel.org/linux-hardening/CAHk-=whaJCEwqKbekSNjziY4RMTKzkRkkrOM4MEZQEo0j3HT=Q@mail.gmail.com/ [1] Changes in v2: - Add Fixes tag. init/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/init/Kconfig b/init/Kconfig index 036b750e8d8a..4b7bac10c72d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -887,7 +887,7 @@ config CC_HAS_INT128 config CC_IMPLICIT_FALLTHROUGH string - default "-Wimplicit-fallthrough=5" if CC_IS_GCC + default "-Wimplicit-fallthrough=5" if CC_IS_GCC && $(cc-option,-Wimplicit-fallthrough=5) default "-Wimplicit-fallthrough" if CC_IS_CLANG && $(cc-option,-Wunreachable-code-fallthrough) #