From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75949C43444 for ; Mon, 14 Jan 2019 09:59:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51C2120660 for ; Mon, 14 Jan 2019 09:59:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726980AbfANJ7H convert rfc822-to-8bit (ORCPT ); Mon, 14 Jan 2019 04:59:07 -0500 Received: from ozlabs.org ([203.11.71.1]:59979 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726938AbfANJ7F (ORCPT ); Mon, 14 Jan 2019 04:59:05 -0500 Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPSA id 43dTSt3ZpZz9sBQ; Mon, 14 Jan 2019 20:58:54 +1100 (AEDT) From: Michael Ellerman To: Arnd Bergmann , y2038@lists.linaro.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Arnd Bergmann , ink@jurassic.park.msu.ru, mattst88@gmail.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, tony.luck@intel.com, fenghua.yu@intel.com, geert@linux-m68k.org, monstr@monstr.eu, paul.burton@mips.com, deller@gmx.de, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, dalias@libc.org, davem@davemloft.net, luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, jcmvbkbc@gmail.com, firoz.khan@linaro.org, ebiederm@xmission.com, deepa.kernel@gmail.com, linux@dominikbrodowski.net, akpm@linux-foundation.org, dave@stgolabs.net, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org Subject: Re: [PATCH 14/15] arch: add split IPC system calls where needed In-Reply-To: <87pnsz28k2.fsf@concordia.ellerman.id.au> References: <20190110162435.309262-1-arnd@arndb.de> <20190110162435.309262-15-arnd@arndb.de> <87pnsz28k2.fsf@concordia.ellerman.id.au> Date: Mon, 14 Jan 2019 20:58:52 +1100 Message-ID: <87muo31rxf.fsf@concordia.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Michael Ellerman writes: > Hi Arnd, > > Arnd Bergmann writes: >> The IPC system call handling is highly inconsistent across architectures, >> some use sys_ipc, some use separate calls, and some use both. We also >> have some architectures that require passing IPC_64 in the flags, and >> others that set it implicitly. ... > > We already have a gap at 366-377 from when we tried to add the split IPC > calls a few years back. > > I guess I don't mind leaving that gap and using the common numbers as > you've done here. > > But it would be good to add a comment pointing out that we have room > at 366 for more arch specific syscalls as well. > > cheers Guess I sent that one twice. 🤦 cheers