From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from verein.lst.de ([213.95.11.211]:42860 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750786AbdEUGz7 (ORCPT ); Sun, 21 May 2017 02:55:59 -0400 Date: Sun, 21 May 2017 08:55:57 +0200 From: Christoph Hellwig Subject: Re: [PATCH 03/23] uuid: remove uuid_be defintions from the uapi header Message-ID: <20170521065557.GC13004@lst.de> References: <20170518071352.GA515@lst.de> <20170518062705.25902-1-hch@lst.de> <20170518062705.25902-4-hch@lst.de> <1495091565.31562.28.camel@perches.com> <13041.1495191521@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <13041.1495191521@warthog.procyon.org.uk> Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: David Howells Cc: Christoph Hellwig , Joe Perches , Andy Shevchenko , Amir Goldstein , linux-fsdevel@vger.kernel.org, Shaohua Li , Dan Williams , Steven Whitehouse , Mimi Zohar , linux-xfs@vger.kernel.org, linux-raid@vger.kernel.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org On Fri, May 19, 2017 at 11:58:41AM +0100, David Howells wrote: > Christoph Hellwig wrote: > > > It's not a userspace ABI, so by defintion it does not break an > > existing user program. > > That's an invalid assumption. It is a de facto userspace ABI as it has been > exposed in /usr/include/linux/uuid.h for some time. It is never passed through any kernel interface, which by defintion does not make it an ABI. And even if it was we are not going to change the ABI for a uuid_t ever. We're just changing the internal name, and stop exposing the old name which was never used in an ABI to userspace.