From patchwork Mon Oct 16 13:24:40 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Rutland X-Patchwork-Id: 115919 Delivered-To: patch@linaro.org Received: by 10.140.22.163 with SMTP id 32csp3683487qgn; Mon, 16 Oct 2017 06:25:10 -0700 (PDT) X-Google-Smtp-Source: AOwi7QDUrhTiODRWrbGu3zGOzSFD43szjaAd2Eo4rWyJI2LM1XVp7b/C1z3ZtwTc/qQMC/kExpTo X-Received: by 10.84.176.100 with SMTP id u91mr9197323plb.10.1508160310623; Mon, 16 Oct 2017 06:25:10 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1508160310; cv=none; d=google.com; s=arc-20160816; b=PhMJCHlpOnPsqChxdP4c6lYqnGPa3wb1liZUnL0lEylLxCfYZ2w8W1BLj7YJFf5e5Q Lzbtu0dL13rZ9cWY0cyKgtb7H4ZxMgOcH7ga4NR3xEUBPq5vZSXCpIMr1PnIJ4A734Wl XSIvjogDrSmD6QuMZ4+Vr/bjzFDx2/qtdeJy+HGkNkmM1tXYxS1mQ3NVcZeK5Hto3a6r JGJrIkBKzp22OfB1lpvmsN24z+AyJzZ92lBiZhAPjJ6Umt3OC+Cxj4bsvS+8ov3KkzFj 2yvZIPZFGz7SY+M3yxLrcAL2D/Ol49rn1v8D6xwAotgz7RMcY8Ch+jI2z7O0aGSDN2sr mAZA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=4tZaABhuGOfaHxwHEVp1dAmKmXHXky6oYatnw8Lt2zA=; b=ihgQT6+jDcmiAfABohGyGj+LYkqS/aMMmieNcrWId3UFQP0JyFr5BWwJP0+Wtp+b5z LEWsMWOfanlmRQatA/I1AvfovT7NgZTiRUl4IIlf20FgiSEVoBTbLvmQbLWuuGqCYIOx QaMJJPnykvYeKMFh1hg+MdIXe9rJ3FwmomxgVQtDvYHbDdzMn557qRAbfv8VctfnmTtx B51UZ1WJoqwraZk1f2qkSVABs0RdtRg15JoTAdr4pZstN6B1RgPSP299EserQ/w8ob3J ij2zlMBvZOgwzPg6YbyKzCMO8UiPf+L9o6HeZwRq2ByfoCnU/DrXkNHb5ELW0vUYW8Cw mKeA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id n19si4092776pgd.755.2017.10.16.06.25.10; Mon, 16 Oct 2017 06:25:10 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753108AbdJPNZH (ORCPT + 27 others); Mon, 16 Oct 2017 09:25:07 -0400 Received: from foss.arm.com ([217.140.101.70]:56968 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753088AbdJPNZF (ORCPT ); Mon, 16 Oct 2017 09:25:05 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 50821169E; Mon, 16 Oct 2017 06:25:05 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 110883F53D; Mon, 16 Oct 2017 06:25:02 -0700 (PDT) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, adech.fo@gmail.com, aryabinin@virtuozzo.com, catalin.marinas@arm.com, christoffer.dall@linaro.org, dvyukov@google.com, linux-kbuild@vger.kernel.org, mark.rutland@arm.com, mark.zyngier@arm.com, mmarek@suse.com, will.deacon@arm.com, yamada.masahiro@socionext.com Subject: [PATCH 4/4] arm64: vdso: remove pointless gcov option Date: Mon, 16 Oct 2017 14:24:40 +0100 Message-Id: <20171016132440.38098-5-mark.rutland@arm.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171016132440.38098-1-mark.rutland@arm.com> References: <20171016132440.38098-1-mark.rutland@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The arm64 VDSO Makefile explicitly disables gcov; a practice we seem to have inherited from other VDSO Makefiles. The arm64 VDSO is written entirely in assembly, so this is not necessary. Further, if the VDSO were written in C it would be necessary to disable all other instrumentation, and this alone would not be sufficient. This patch remosves the redundant GCOV option for now. Cc: Catalin Marinas Reported-by: Will Deacon Signed-off-by: Mark Rutland --- arch/arm64/kernel/vdso/Makefile | 3 --- 1 file changed, 3 deletions(-) -- 2.11.0 diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 62c84f7cb01b..350190b749dd 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -15,9 +15,6 @@ ccflags-y := -shared -fno-common -fno-builtin ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \ $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) -# Disable gcov profiling for VDSO code -GCOV_PROFILE := n - # Workaround for bare-metal (ELF) toolchains that neglect to pass -shared # down to collect2, resulting in silent corruption of the vDSO image. ccflags-y += -Wl,-shared