From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966637AbdACWZx (ORCPT ); Tue, 3 Jan 2017 17:25:53 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:63665 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966612AbdACWZo (ORCPT ); Tue, 3 Jan 2017 17:25:44 -0500 From: Arnd Bergmann To: Paul Bolle Cc: Greg Kroah-Hartman , devel@driverdev.osuosl.org, Karsten Keil , linux-doc@vger.kernel.org, netdev@vger.kernel.org, Jonathan Corbet , linux-kernel@vger.kernel.org, "David S. Miller" , linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH 2/2] isdn: i4l: move active-isdn drivers to staging Date: Tue, 03 Jan 2017 23:25:04 +0100 Message-ID: <3780968.pTT7cvIH4p@wuerfel> User-Agent: KMail/5.1.3 (Linux/4.4.0-34-generic; KDE/5.18.0; x86_64; ; ) In-Reply-To: <1483480459.10534.8.camel@tiscali.nl> References: <1456945629-1793533-1-git-send-email-arnd@arndb.de> <3286019.I2UkVCJq41@wuerfel> <1483480459.10534.8.camel@tiscali.nl> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:mM+l5xp7GaQNath5rE9TeeTTo6sIs6emh0vTkl2XrzsoDzbdep4 W0gq381Ss/keBPymd4WI0adkdKHSZN7lKjwSVEfMlk42Ez+CuqRyuKLDh/H//ooM9iMlY0w g/T8k2FRf3Eelislv9ezFOpRBiSAkWcjzHYGXAhrWass0mlNAvLAEzh12HQ9T+DhK4ftdYR TDN+0TiCkvGiwh+a+1gug== X-UI-Out-Filterresults: notjunk:1;V01:K0:sBRYYxV7sdc=:So4F66kdhaouzy2nggnpoe 4nNKebjVHg6SzdxD++Wfam/35H147Hbs4aTij4n9PZ/Eaw8eGX/Ubk/TGYP20KG9TQ7u79ig+ TjNH4oWiHMOumn8WZfU8YUSbuyQrtK538FTVH7gupPLkhvXTRd68ASa37qhrxl50LMXuiN47G iR7Om0PFjTlQJ+mj2TNAKAYzcwaal+sHFyMtCgz+FDBW/FLkJ8oiSFod5J1WTEAxnCHyXIqHX pgfUfDIbiX5B6wLysdMZUIXwXMKSefTCqD1gOEuscRCd1+lIlIFFHeB5Qih3CtgDXXRi+vYCQ xp3X2sdyyJZGhqVCI+HabiH1q1MlTF2yeByvNhMZDRd98OiV3UyoDzEMYdU9xJQVL1JR9enjk ok2kfI6gk0sdnFJl4jV9lvSpLkR0tr+N4YDohsoba2kanircfTsehLNUHnebf+WwOr/UDkHj7 OHt87thLsq2e9Lh3VOa/vA7gu+7kAaZh45Xo2Wqo3UcDrJECLm3Lx/LI7U+JQQZU+kNXjZYgr 4Gzx/tsTfAZYSNEK2aip4BJaCl/Bhm/sTcikLFyx37SpthG+BLlswQ7Fr/ftWBXAOpMSqe8p/ JO5azK/7SCqSFhS3cRfVKfNlW2AKlTbB0bt0C8pEch6j+WHflbFv+ucZN1Z0kMRsKGrJqDsLS vsaGfeGVa6NFL327GMAt7JPsdWtfx6Rt0fWHO7ebji9S8QUbv9OufRbcfzLpnjUJZ4XDsDZvH NRoXrYhQRSkMXjKN Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday, January 3, 2017 10:54:19 PM CET Paul Bolle wrote: > On Tue, 2017-01-03 at 22:19 +0100, Arnd Bergmann wrote: > > isdn: move isdnhdlc out of i4l > > isdn: i4l: move hisax driver to staging > > isdn: move i4l to staging > > > > I can post those as well, at least I think the first two are helpful > > for untangling i4l from the rest of ISDN. I also still think that > > moving hisax and i4l to staging is reasonable given the state of > > that code, even if there are a couple of users today. > > There are? And even if there are: is there any reason to expect that moving > the rest of i4l to staging will result in anything other than a stream of > checkpatch cleanups? To clarify: Karsten's concern was about the loss of features that are present in i4l but not in mISDN. There were active users of those features last year, so I assumed that there are still a few this year. However, whether any of those users would ever need to move to a 4.11 kernel or newer is an entirely different question. As far as I'm concerned, we are totally fine as long as there exists a longterm supported kernel that has i4l in drivers/staging. If we move i4l to staging for v4.11 with the intention of removing it after the 2018 longterm release (i.e. after Deutsche Telekom turns off their ISDN network), that gives us at least until 2020. I assume there will be at least one older kernel with a longer end-of-support date. > How often did a bunch of drivers re-enter the tree after being sent to > staging? Greg can probably answer that. I'm sure it's either never or very rare. The only case of removed code coming back later is arch/h8300, which was removed in 2013 and replaced with a much nicer implementation in 2015. Arnd