From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753467AbaCaMg3 (ORCPT ); Mon, 31 Mar 2014 08:36:29 -0400 Received: from mail-we0-f169.google.com ([74.125.82.169]:33405 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751310AbaCaMgR (ORCPT ); Mon, 31 Mar 2014 08:36:17 -0400 Date: Mon, 31 Mar 2014 14:36:09 +0200 From: Ingo Molnar To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, "H. Peter Anvin" , Thomas Gleixner , Andrew Morton Subject: [GIT PULL] x86/build change for v3.15 Message-ID: <20140331123609.GA9460@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus, Please pull the latest x86-build-for-linus git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-build-for-linus # HEAD: b399fe355b30d0102e7690c99e6f764ddfd32ec3 x86: Disable generation of traditional x87 instructions Explicitly disable x87 FPU instructions, to catch mistaken floating point use at build time, instead of crashing or misbehaving during run time. Thanks, Ingo ------------------> Borislav Petkov (1): x86: Disable generation of traditional x87 instructions arch/x86/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/Makefile b/arch/x86/Makefile index eeda43a..a414b14 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -82,8 +82,8 @@ else KBUILD_AFLAGS += -m64 KBUILD_CFLAGS += -m64 - # Don't autogenerate MMX or SSE instructions - KBUILD_CFLAGS += -mno-mmx -mno-sse + # Don't autogenerate traditional x87, MMX or SSE instructions + KBUILD_CFLAGS += -mno-mmx -mno-sse -mno-80387 -mno-fp-ret-in-387 # Use -mpreferred-stack-boundary=3 if supported. KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3)