From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750781AbbABHxT (ORCPT ); Fri, 2 Jan 2015 02:53:19 -0500 Received: from mga01.intel.com ([192.55.52.88]:45942 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750711AbbABHxS (ORCPT ); Fri, 2 Jan 2015 02:53:18 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.07,683,1413270000"; d="scan'208";a="655941094" Message-ID: <54A64E6D.1020304@linux.intel.com> Date: Thu, 01 Jan 2015 23:53:17 -0800 From: Dave Hansen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Andy Lutomirski , linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner Subject: Re: [PATCH 3.19 3/3] x86, mpx: Change the MPX enable/disable API to arch_prctl References: In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/29/2014 04:52 PM, Andy Lutomirski wrote: > This has the benefit the it avoids cluttering prctl with more > arch-specific functionality. The down side is that arch_prctl will > need to be wired up as a 32-bit syscall to add 32-bit support for > MPX. There is existing userspace out there which depends on the existing prctl() setup. There isn't a _lot_ and it might still be able to be changed easily, but this isn't a given. I'll check in with the folks doing the gcc (runtime) part of this next week and see what they think.