From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755183AbbBBVdM (ORCPT ); Mon, 2 Feb 2015 16:33:12 -0500 Received: from mga11.intel.com ([192.55.52.93]:8290 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755181AbbBBVbc (ORCPT ); Mon, 2 Feb 2015 16:31:32 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,508,1418112000"; d="scan'208";a="646349362" Subject: [PATCH 9/9] x86, mpx: allow mixed binaries again To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen , dave.hansen@linux.intel.com From: Dave Hansen Date: Mon, 02 Feb 2015 13:31:39 -0800 References: <20150202213127.0171DBC1@viggo.jf.intel.com> In-Reply-To: <20150202213127.0171DBC1@viggo.jf.intel.com> Message-Id: <20150202213139.18A2497A@viggo.jf.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dave Hansen We explicitly disable allowing 32-bit binaries to enable MPX on 64-bit kernels. Re-allow that. Signed-off-by: Dave Hansen --- b/arch/x86/mm/mpx.c | 6 ------ 1 file changed, 6 deletions(-) diff -puN arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again arch/x86/mm/mpx.c --- a/arch/x86/mm/mpx.c~x86-mpx-allow-mixed-binaries-again 2015-02-02 09:55:03.487614691 -0800 +++ b/arch/x86/mm/mpx.c 2015-02-02 09:55:03.490614826 -0800 @@ -365,12 +365,6 @@ static __user void *task_get_bounds_dir( return MPX_INVALID_BOUNDS_DIR; /* - * 32-bit binaries on 64-bit kernels are currently - * unsupported. - */ - if (IS_ENABLED(CONFIG_X86_64) && test_thread_flag(TIF_IA32)) - return MPX_INVALID_BOUNDS_DIR; - /* * The bounds directory pointer is stored in a register * only accessible if we first do an xsave. */ _