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=-14.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 69579C2BAEE for ; Tue, 24 Mar 2020 13:33:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3396F206F6 for ; Tue, 24 Mar 2020 13:33:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585056790; bh=ifh5+NO2a8Bf7LjnkrDL9Kt1p7E0gJkTC3guzHdEZxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iqRL1bqY0g+kxHv3dLIk7ATes5qfsf7RuZpyC2Z8FeXBctegU0omsl3M3PXzd0s7A w7SpHrNNyJPuVRkGsAWrtDa9Ydz+gXkEUVRBIjOh6pNEAZ+UUgTJ8AdsuGpfMPngHt iVytN0eXvoJYos/djsRYDZuehLr9MfjLArgHk2gI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728230AbgCXNPR (ORCPT ); Tue, 24 Mar 2020 09:15:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:34092 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727561AbgCXNPQ (ORCPT ); Tue, 24 Mar 2020 09:15:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 17FBE2137B; Tue, 24 Mar 2020 13:15:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585055715; bh=ifh5+NO2a8Bf7LjnkrDL9Kt1p7E0gJkTC3guzHdEZxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CI6nO3J7GZjGG/epma1MJqPNOcT6z8DG2ZIfTMmFT/XFBDsKAuCCnN/jg+LLP5Nr/ rkSsi/tXN1Y2Z95HKlayhYQrTVK4/1h4usc+QAxgZXc9v/1rlY33rZ+6Xrq9n5PKMu tUWHLWEFi9xM9ZxHEgrH9M/erSRJVDwy91Y5OLvU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nathan Chancellor , Masahiro Yamada , Sasha Levin Subject: [PATCH 4.19 55/65] kbuild: Disable -Wpointer-to-enum-cast Date: Tue, 24 Mar 2020 14:11:16 +0100 Message-Id: <20200324130803.760587988@linuxfoundation.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200324130756.679112147@linuxfoundation.org> References: <20200324130756.679112147@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Nathan Chancellor commit 82f2bc2fcc0160d6f82dd1ac64518ae0a4dd183f upstream. Clang's -Wpointer-to-int-cast deviates from GCC in that it warns when casting to enums. The kernel does this in certain places, such as device tree matches to set the version of the device being used, which allows the kernel to avoid using a gigantic union. https://elixir.bootlin.com/linux/v5.5.8/source/drivers/ata/ahci_brcm.c#L428 https://elixir.bootlin.com/linux/v5.5.8/source/drivers/ata/ahci_brcm.c#L402 https://elixir.bootlin.com/linux/v5.5.8/source/include/linux/mod_devicetable.h#L264 To avoid a ton of false positive warnings, disable this particular part of the warning, which has been split off into a separate diagnostic so that the entire warning does not need to be turned off for clang. It will be visible under W=1 in case people want to go about fixing these easily and enabling the warning treewide. Cc: stable@vger.kernel.org Link: https://github.com/ClangBuiltLinux/linux/issues/887 Link: https://github.com/llvm/llvm-project/commit/2a41b31fcdfcb67ab7038fc2ffb606fd50b83a84 Signed-off-by: Nathan Chancellor Signed-off-by: Masahiro Yamada Signed-off-by: Sasha Levin --- scripts/Makefile.extrawarn | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 8d5357053f865..486e135d3e30a 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -72,5 +72,6 @@ KBUILD_CFLAGS += $(call cc-disable-warning, format) KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare) KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length) KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized) +KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) endif endif -- 2.20.1