From patchwork Mon Jun 12 09:07:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 106409 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp2469713vqr; Mon, 12 Jun 2023 02:57:29 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5hELyCM2J6cGE3zCr4eaDp40AH0xUsTGY4A3daTdGDmf+VnMx7QxBtVqhGq5hJyf20B+GN X-Received: by 2002:a17:903:2582:b0:1b2:43a2:f2d with SMTP id jb2-20020a170903258200b001b243a20f2dmr5062678plb.32.1686563849389; Mon, 12 Jun 2023 02:57:29 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1686563849; cv=none; d=google.com; s=arc-20160816; b=ZdOUKOo6QmnX7q4m5X16R34JWIBrujMq6j8ge5kdk4ZFyV2oYHzTOs4n91GW1A6jNY YfjPDlvdZS4KtJ2YI5Esv3YDhHEO6wQqNu1ADlrfY/YdP0a4AoZvV0AHTyHF7+ZPdYQ8 olLBh+HQpsgHwJ1HwPXcTXSm7sKFrpoOmL3gUi23TdCHCXMmttKsO1WG/c9XD/unk4Ps t26hHd3sM89vGForXMG/QtfTx9OqoM0fVDQf/sAXLf/4WniIUlEzUYtvU33POAUSklbh UJa0FmEe6sQPn9eZgZOsDLQ/DEXAEVt5YCpw4x/rhjkUeHeaR2duMppxrIcFL5GVNcKT jmVw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:subject:cc:to:from:date :user-agent:message-id:dkim-signature; bh=iuKjwptMM283OkeCg3rHRYfDPMncNnTiTfZUlZvzjjw=; b=qwAIq7Q4i0RI3zm46ECXPKgO2sEkK1XmsDsnu276UHf3o9Y3F5gUDrZ+FKFrYDrsCl 97CTbMqyxWXq4bPDz2XDMc+NdUwoSbVoHG5p4bccY4F5m+cIfNlS/f7pyf6RWloDEdIN 4Z94G3467UtM3m7fhXfjFx5z2eDDjZolHsken1u9a3hJJSyBt7Lgm0btgBaCWjazoHiD f14tdf063S9vwpHUjw1VAfeQ/EW97WAXctOVfvhM1wgOxSH5BE6Gyl4/srWNZcuwlu/x 3f69YZNfA78AFv2BH1WTUiNXELrx7iXJjEbS/Cx6nIFeh6e5A8KzrL0pGbt42EiF/CT+ ssmw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=desiato.20200630 header.b=eQ6OsD4k; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id b10-20020a170902d88a00b001a814f7db5fsi6563533plz.632.2023.06.12.02.57.09; Mon, 12 Jun 2023 02:57:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=desiato.20200630 header.b=eQ6OsD4k; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235516AbjFLJzx (ORCPT + 99 others); Mon, 12 Jun 2023 05:55:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230186AbjFLJyT (ORCPT ); Mon, 12 Jun 2023 05:54:19 -0400 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C79749FA; Mon, 12 Jun 2023 02:38:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=iuKjwptMM283OkeCg3rHRYfDPMncNnTiTfZUlZvzjjw=; b=eQ6OsD4kYVKLafcm5zMaXykUrJ t3Yx8a+byrZdB944/0aNdLOqAmoLeWSa1sowLg19pvZhRfEGH12EfjQizZN73l+Q2lmgWVTy/jEN2 66w/tSoR035EtMK1QJrtp16Z85OKpvfSl1I8OLy7JSDS0vEBXw8vGKRffU4u96Gz85h50NrSym32v 8aadmJp7+8xctTmftjzi5KRquTBd3yr6fYIYX7v7Rb7TZGAQFPvFwW5JY6GaXXShnDrDMfhQWRx/H Hx6pFtrNHcKkz/xQw6bxea1nVgSbzWPnczzWWwxrD46aGrv+zXbaZt8xVprl8zZZmhqQuJnaVP8+3 u9+4lFQg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1q8e0f-008kOo-0K; Mon, 12 Jun 2023 09:38:49 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 7FC1C302E28; Mon, 12 Jun 2023 11:38:48 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 0C29230A58077; Mon, 12 Jun 2023 11:38:48 +0200 (CEST) Message-ID: <20230612093537.693926033@infradead.org> User-Agent: quilt/0.66 Date: Mon, 12 Jun 2023 11:07:17 +0200 From: Peter Zijlstra To: torvalds@linux-foundation.org, keescook@chromium.org, gregkh@linuxfoundation.org, pbonzini@redhat.com Cc: masahiroy@kernel.org, nathan@kernel.org, ndesaulniers@google.com, nicolas@fjasle.eu, catalin.marinas@arm.com, will@kernel.org, vkoul@kernel.org, trix@redhat.com, ojeda@kernel.org, peterz@infradead.org, mingo@redhat.com, longman@redhat.com, boqun.feng@gmail.com, dennis@kernel.org, tj@kernel.org, cl@linux.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, irogers@google.com, adrian.hunter@intel.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, paulmck@kernel.org, frederic@kernel.org, quic_neeraju@quicinc.com, joel@joelfernandes.org, josh@joshtriplett.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, rientjes@google.com, vbabka@suse.cz, roman.gushchin@linux.dev, 42.hyeyoo@gmail.com, apw@canonical.com, joe@perches.com, dwaipayanray1@gmail.com, lukas.bulwahn@gmail.com, john.johansen@canonical.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, llvm@lists.linux.dev, linux-perf-users@vger.kernel.org, rcu@vger.kernel.org, linux-security-module@vger.kernel.org, tglx@linutronix.de, ravi.bangoria@amd.com, error27@gmail.com, luc.vanoostenryck@gmail.com Subject: [PATCH v3 04/57] kbuild: Drop -Wdeclaration-after-statement References: <20230612090713.652690195@infradead.org> MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1768490375178963547?= X-GMAIL-MSGID: =?utf-8?q?1768490375178963547?= With the advent on scope-based resource management it comes really tedious to abide by the contraints of -Wdeclaration-after-statement. It will still be recommeneded to place declarations at the start of a scope where possible, but it will no longer be enforced. Suggested-by: Linus Torvalds Signed-off-by: Peter Zijlstra (Intel) --- Makefile | 6 +----- arch/arm64/kernel/vdso32/Makefile | 2 -- 2 files changed, 1 insertion(+), 7 deletions(-) --- a/Makefile +++ b/Makefile @@ -447,8 +447,7 @@ HOSTRUSTC = rustc HOSTPKG_CONFIG = pkg-config KBUILD_USERHOSTCFLAGS := -Wall -Wmissing-prototypes -Wstrict-prototypes \ - -O2 -fomit-frame-pointer -std=gnu11 \ - -Wdeclaration-after-statement + -O2 -fomit-frame-pointer -std=gnu11 KBUILD_USERCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(USERCFLAGS) KBUILD_USERLDFLAGS := $(USERLDFLAGS) @@ -1012,9 +1011,6 @@ endif # arch Makefile may override CC so keep this after arch Makefile is included NOSTDINC_FLAGS += -nostdinc -# warn about C99 declaration after statement -KBUILD_CFLAGS += -Wdeclaration-after-statement - # Variable Length Arrays (VLAs) should not be used anywhere in the kernel KBUILD_CFLAGS += -Wvla --- a/arch/arm64/kernel/vdso32/Makefile +++ b/arch/arm64/kernel/vdso32/Makefile @@ -65,11 +65,9 @@ VDSO_CFLAGS += -Wall -Wundef -Wstrict-pr -fno-strict-aliasing -fno-common \ -Werror-implicit-function-declaration \ -Wno-format-security \ - -Wdeclaration-after-statement \ -std=gnu11 VDSO_CFLAGS += -O2 # Some useful compiler-dependent flags from top-level Makefile -VDSO_CFLAGS += $(call cc32-option,-Wdeclaration-after-statement,) VDSO_CFLAGS += $(call cc32-option,-Wno-pointer-sign) VDSO_CFLAGS += -fno-strict-overflow VDSO_CFLAGS += $(call cc32-option,-Werror=strict-prototypes)