From nobody Sun Dec 14 06:22:11 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 709C7C43217 for ; Wed, 5 Oct 2022 11:38:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230243AbiJELiy (ORCPT ); Wed, 5 Oct 2022 07:38:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230093AbiJELhi (ORCPT ); Wed, 5 Oct 2022 07:37:38 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2C0974DF4; Wed, 5 Oct 2022 04:35:05 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0248BB81DB8; Wed, 5 Oct 2022 11:35:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51898C433C1; Wed, 5 Oct 2022 11:35:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1664969702; bh=xSuAihsjkHs/qqp/+v/TFR04hTHtsVz3pZtXM2Vuxi0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q3/3xptYe+Pffo9qWqtUcIwP+05pIoMqElA0cTwJQYuKPCkZB0mwsH3yEjdCmfBI2 e7pxViXXmhCUSMrRMlrjJ4HzQpxBHlPz98Whfrbf867evuwadOzLwC7MbvG5Hq4I6k lJuyF+uHinpH0TGpVJ+yvMr10FUZDrJnO5s7Kz/0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nathan Chancellor , Sami Tolvanen , Kees Cook Subject: [PATCH 5.4 50/51] Makefile.extrawarn: Move -Wcast-function-type-strict to W=1 Date: Wed, 5 Oct 2022 13:32:38 +0200 Message-Id: <20221005113212.556753745@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221005113210.255710920@linuxfoundation.org> References: <20221005113210.255710920@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Sami Tolvanen commit 2120635108b35ecad9c59c8b44f6cbdf4f98214e upstream. We enable -Wcast-function-type globally in the kernel to warn about mismatching types in function pointer casts. Compilers currently warn only about ABI incompability with this flag, but Clang 16 will enable a stricter version of the check by default that checks for an exact type match. This will be very noisy in the kernel, so disable -Wcast-function-type-strict without W=3D1 until the new warnings have been addressed. Cc: stable@vger.kernel.org Link: https://reviews.llvm.org/D134831 Link: https://github.com/ClangBuiltLinux/linux/issues/1724 Suggested-by: Nathan Chancellor Signed-off-by: Sami Tolvanen Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20220930203310.4010564-1-samitolvanen@googl= e.com Signed-off-by: Greg Kroah-Hartman --- scripts/Makefile.extrawarn | 1 + 1 file changed, 1 insertion(+) --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -50,6 +50,7 @@ KBUILD_CFLAGS +=3D -Wno-sign-compare KBUILD_CFLAGS +=3D -Wno-format-zero-length KBUILD_CFLAGS +=3D $(call cc-disable-warning, pointer-to-enum-cast) KBUILD_CFLAGS +=3D $(call cc-disable-warning, unaligned-access) +KBUILD_CFLAGS +=3D $(call cc-disable-warning, cast-function-type-strict) endif =20 endif