From patchwork Thu Feb 18 17:05:07 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 102738 Delivered-To: patch@linaro.org Received: by 10.112.43.199 with SMTP id y7csp701393lbl; Thu, 18 Feb 2016 09:06:10 -0800 (PST) X-Received: by 10.66.159.136 with SMTP id xc8mr11652248pab.71.1455815170136; Thu, 18 Feb 2016 09:06:10 -0800 (PST) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a5si10421770pat.19.2016.02.18.09.06.09; Thu, 18 Feb 2016 09:06:10 -0800 (PST) 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 S1946723AbcBRRGH (ORCPT + 30 others); Thu, 18 Feb 2016 12:06:07 -0500 Received: from mout.kundenserver.de ([217.72.192.75]:64333 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1946164AbcBRRGE (ORCPT ); Thu, 18 Feb 2016 12:06:04 -0500 Received: from wuerfel.lan. ([78.42.132.4]) by mrelayeu.kundenserver.de (mreue104) with ESMTPA (Nemesis) id 0MIw6j-1aYMlD3WVV-002VGw; Thu, 18 Feb 2016 18:05:34 +0100 From: Arnd Bergmann To: Russell King Cc: linux-arm-kernel@lists.infradead.org, Arnd Bergmann , Ard Biesheuvel , Nicolas Pitre , Jon Medhurst , Marc Zyngier , linux-kernel@vger.kernel.org Subject: [PATCH 1/3] [RESEND] ARM: pass -march=armv7-a when building NEON files with clang Date: Thu, 18 Feb 2016 18:05:07 +0100 Message-Id: <1455815113-2562966-2-git-send-email-arnd@arndb.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1455815113-2562966-1-git-send-email-arnd@arndb.de> References: <1455815113-2562966-1-git-send-email-arnd@arndb.de> X-Provags-ID: V03:K0:dAbiknHTN1q1H8z++IIjIaNMcN0r/4mhRVirvRh6QCkSXpZ3aQx e6kTV1teN7SghCbaXg8kNGsa6EN6UwWoV9Ni6C5BbsX4n2n4sszKDudPdGZCpEKHBJp5mCk 7zF7TRAU+U28O//YFhRpzkxBsvMk5e1Y4eadq9dGYhmHpPgY5WsVZS1PzJnxmbmdh+dJ2BH 73aKxLJk5M8pkzFrJC9Cg== X-UI-Out-Filterresults: notjunk:1; V01:K0:HOZ3EsnAvMU=:bArIJgbj36JixQYCmw3EAz vsqM6R2Uwk/cqFTGm7O182KHZEueaTKLjrRXd5H6dwioMUe6uU47tPrT/xH8GTVzIAJ9KiOn0 mSJbT5reDMKYm9rsCdbBE/c84qlNTmlOktqs9OKY6bKxoCbXgOqMlwSgdVfY5yHg6RPNEGQqg sM9gk+8TvBbmqvPFJWcv52iWto0fglQZ80cON6CPAdbV4VPOxO2jdXAYCE2x+9tuZ77oOIJGD Zw/txk27Q6DE3W37GrlbZQKWjfXOxH/XqoFC6Qg23ezdOTdF58pvOA5xSW/UP/dszec+yXUhq wT6+D9OZcZyT1wKVRbNVbYI77VLOmlbN4aJSBPHgiHjBlxODeaWIjV8rqyzTGNXLWA6/qDYoS U/yAVYftLfVzmtB/obb9DWkOdpNPi3tJUloNDe2XNS95wHUqc2f3mc2/O29tiA8STJqsh/0s2 9y8N4BSJAXdPhLK+ZR6hcr2cFa1yxSrKynymuLnm+tL8uRYei4X85I73RWdnSUV5Yzbb6i4U1 aocOOuzR6EAYPPOoa3QjQ/axxz5i2CINrpx+3pqdJj3kzTJdjPZEfikf+485c+47Q5Cvmkg7A A6lI1j5aWYhCVkFs8kZP7r4cNG7vVWUtmu3ZURUUEO0tyJKnblKiyMDuW0CjYel8U1uxhC9Gg dkrftl5uthhiQbhIbte/P88amLBuDnVtjiXMcTN6R0cw+5t0USQd7VR2cLcg+j2o9UIE= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org clang ignores the -mfpu=neon flag when building with -march=armv6: In file included from lib/raid6/neon1.c:27: clang/3.8.0/include/arm_neon.h:28:2: error: "NEON support not enabled" There is no real need to build the file with -march=armv6 in a multi-CPU enabled kernel, as nothing in here will ever get called on an ARMv6 CPU. Adding -march=armv7 doesn't hurt and can only improve the code quality. Signed-off-by: Arnd Bergmann --- arch/arm/lib/Makefile | 2 +- lib/raid6/Makefile | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) -- 2.7.0 diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index d8a780799506..a86c6c8e0648 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -35,7 +35,7 @@ $(obj)/csumpartialcopy.o: $(obj)/csumpartialcopygeneric.S $(obj)/csumpartialcopyuser.o: $(obj)/csumpartialcopygeneric.S ifeq ($(CONFIG_KERNEL_MODE_NEON),y) - NEON_FLAGS := -mfloat-abi=softfp -mfpu=neon + NEON_FLAGS := -mfloat-abi=softfp -mfpu=neon -march=armv7-a CFLAGS_xor-neon.o += $(NEON_FLAGS) obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o endif diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile index 3b10a48fa040..4ef3e800fb39 100644 --- a/lib/raid6/Makefile +++ b/lib/raid6/Makefile @@ -23,7 +23,7 @@ endif ifeq ($(CONFIG_KERNEL_MODE_NEON),y) NEON_FLAGS := -ffreestanding ifeq ($(ARCH),arm) -NEON_FLAGS += -mfloat-abi=softfp -mfpu=neon +NEON_FLAGS += -mfloat-abi=softfp -mfpu=neon -march=armv7-a endif ifeq ($(ARCH),arm64) CFLAGS_REMOVE_neon1.o += -mgeneral-regs-only