Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933993AbcLAQO0 (ORCPT ); Thu, 1 Dec 2016 11:14:26 -0500 Received: from mx2.suse.de ([195.135.220.15]:50087 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754625AbcLAQOX (ORCPT ); Thu, 1 Dec 2016 11:14:23 -0500 Subject: Re: [PATCH] x86/kbuild: enable modversions for symbols exported from asm To: Don Zickus , Linus Torvalds References: <20161129131922.GA31466@angband.pl> <20161129135118.24696-1-kilobyte@angband.pl> <30bb2db4-47bd-0c35-8328-ef032b551f06@suse.com> <20161129195721.GI2697@decadent.org.uk> <20161201051852.28dc335f@roar.ozlabs.ibm.com> <20161201041325.GX35881@redhat.com> Cc: Nicholas Piggin , skozina@redhat.com, Ben Hutchings , Adam Borowski , Greg Kroah-Hartman , Linux Kbuild mailing list , Debian kernel maintainers , "linux-arch@vger.kernel.org" , Arnd Bergmann , Ingo Molnar , Linux Kernel Mailing List From: Michal Marek Message-ID: <29219570-8ede-8388-9313-d1d4db226b2a@suse.com> Date: Thu, 1 Dec 2016 17:14:19 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 MIME-Version: 1.0 In-Reply-To: <20161201041325.GX35881@redhat.com> 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 Content-Length: 595 Lines: 12 On 2016-12-01 05:13, Don Zickus wrote: > Sorry for chiming in late, but yes RHEL is a big user of MODVERSIONS for our > kabi protection work. Despite our best intentions we still have lots of > partners and customers that provide value-add out-of-tree drivers to their > customers. These module builders requested we have a mechanism to allow > rolling modules forward for each of our minor RHEL updates without breaking > their drivers. FWIW, in SLES we use CONFIG_MODVERSION for pretty much the same reasons you listed. We also enable it in openSUSE, but there it's not as crucial. Michal