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=-11.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 72BF0C54FCE for ; Tue, 24 Mar 2020 13:24:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4B4052137B for ; Tue, 24 Mar 2020 13:24:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585056280; bh=210tmJIMG61KprbjyUx2IQ90D8mA6Akj5BTIdzQwmPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wItZKfSzauDzl4vm2Qtsj0AlGhlIYYOWsLKu+f5zwp7PzdHHY9JhTbHZPqvHaItze DTyiTAtbdD4E2RTTYIKmiK7L/IAPYuAu/gkH9l6GqoNtG1w8w+4ME2wEHFKSW6NFY3 TIJbENIBCi5aEwTgRFa7kkiPlqS/H73E5R6W51EM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729253AbgCXNYg (ORCPT ); Tue, 24 Mar 2020 09:24:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:48320 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729189AbgCXNYg (ORCPT ); Tue, 24 Mar 2020 09:24:36 -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 80114208CA; Tue, 24 Mar 2020 13:24:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585056276; bh=210tmJIMG61KprbjyUx2IQ90D8mA6Akj5BTIdzQwmPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZnN3Ujf/etRWHtoWlmW8VhFoDzIzY3KoQDcGQb1TS3Ms5fY2r3CFG6ym1lJIMSNSU +If5Y77yVK0xVDQeGtH5law0lI4TGRvBX0QneZs0jzyl6lB5tUkioupjvDTXDiO7ZJ ZliRlxowbO9oc9lqKYUGjIsRoIfQOjjH2mrNgAFQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nathan Chancellor , Masahiro Yamada Subject: [PATCH 5.5 077/119] kbuild: Disable -Wpointer-to-enum-cast Date: Tue, 24 Mar 2020 14:11:02 +0100 Message-Id: <20200324130816.081552191@linuxfoundation.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200324130808.041360967@linuxfoundation.org> References: <20200324130808.041360967@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: Greg Kroah-Hartman --- scripts/Makefile.extrawarn | 1 + 1 file changed, 1 insertion(+) --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -48,6 +48,7 @@ KBUILD_CFLAGS += -Wno-initializer-overri KBUILD_CFLAGS += -Wno-format KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += -Wno-format-zero-length +KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) endif endif