From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yury Norov Subject: Re: [PATCH 19/25] arm64: ptrace: handle ptrace_request differently for aarch32 and ilp32 Date: Sat, 23 Apr 2016 00:40:13 +0300 Message-ID: <20160422214013.GA2234@yury-N73SV> References: <1459894127-17698-1-git-send-email-ynorov@caviumnetworks.com> <1459894127-17698-20-git-send-email-ynorov@caviumnetworks.com> <20160422171009.GR2998@e104818-lin.cambridge.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: Received: from mail-bn1on0072.outbound.protection.outlook.com ([157.56.110.72]:55008 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751845AbcDVVk4 (ORCPT ); Fri, 22 Apr 2016 17:40:56 -0400 Content-Disposition: inline In-Reply-To: <20160422171009.GR2998@e104818-lin.cambridge.arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Catalin Marinas Cc: arnd@arndb.de, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, pinskia@gmail.com, Prasun.Kapoor@caviumnetworks.com, schwab@suse.de, broonie@kernel.org, linux-doc@vger.kernel.org, heiko.carstens@de.ibm.com, agraf@suse.de, klimov.linux@gmail.com, bamvor.zhangjian@huawei.com, schwidefsky@de.ibm.com, Nathan_Lynch@mentor.com, joseph@codesourcery.com, christoph.muellner@theobroma-systems.com On Fri, Apr 22, 2016 at 06:10:09PM +0100, Catalin Marinas wrote: > On Wed, Apr 06, 2016 at 01:08:41AM +0300, Yury Norov wrote: > > Here new aarch32 ptrace syscall handler is introsuced to avoid run-time > > detection of the task type. > > The reason for this patch isn't clear to me. What's wrong with the > run-time detection? It's not some performance critical code. > > -- > Catalin Hi Catalin, It was requested by Arnd, It's not 'new' syscall basically, just an attempt to avoid run-time detection of things that may be detected an compile-time. Yury.