From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755868AbcBVVZV (ORCPT ); Mon, 22 Feb 2016 16:25:21 -0500 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:56688 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755501AbcBVVZR (ORCPT ); Mon, 22 Feb 2016 16:25:17 -0500 Date: Tue, 23 Feb 2016 06:24:38 +0900 From: Mark Brown To: Doug Anderson Cc: Thierry Reding , Boris Brezillon , Heiko =?iso-8859-1?Q?St=FCbner?= , linux-pwm , Liam Girdwood , Jingoo Han , Lee Jones , linux-fbdev@vger.kernel.org, Bryan Wu , Richard Purdie , Jacek Anaszewski , linux-leds@vger.kernel.org, Maxime Ripard , linux-sunxi@googlegroups.com, "open list:ARM/Rockchip SoC..." , Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Daniel Mack , Haojian Zhuang , Robert Jarzmik , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Olof Johansson Message-ID: <20160222212438.GG18327@sirena.org.uk> References: <1442828009-6241-1-git-send-email-boris.brezillon@free-electrons.com> <2341981.a79ioYM9Es@diego> <20151110173416.GB21727@ulmo> <20160125170855.GA10182@ulmo> <20160203145337.GD9650@ulmo> <20160222175929.GA23899@ulmo> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="xzjdnLf1/heGxxoo" Content-Disposition: inline In-Reply-To: X-Cookie: Adapt. Enjoy. Survive. User-Agent: Mutt/1.5.24 (2015-08-30) X-SA-Exim-Connect-IP: 175.126.181.17 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Re: [PATCH v3 00/12] pwm: add support for atomic update X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --xzjdnLf1/heGxxoo Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Feb 22, 2016 at 11:15:09AM -0800, Doug Anderson wrote: > Note that historically I remember that Linus Torvalds has stated that > there is no stable API within the Linux kernel and that forcing the > in-kernel API to never change was bad for software development. I > tracked down my memory and found > . Linus is rabid about not > breaking userspace, but in general there's no strong requirement to > never change the driver API inside the kernel. That being said, > changing the driver API causes a lot of churn, so presumably changing > it in a backward compatible way (like adding to the API instead of > changing it) will make things happier. You do need to fix the users though, change is fine but you can't cause people's systems to break. --xzjdnLf1/heGxxoo Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAEBCAAGBQJWy3ySAAoJECTWi3JdVIfQrNoH/1Cw18oWE7UK4WO2lmw14JXo ibQFnySnkJAAvRzUNRlgFyFBgbnQ5hawGlA19182OfQV+dLzuuGaLC8OP7vcDeVv mRSxh6xZIDrwrDBzAEJL8r/UG/uVoL9QUQgOrZgYO3rGGIaUgXBFuAMuo8v3869f 1oGMCC6UgimacwBuerYxPiqwbtsMHmn2FLM3OzRIAJUiyIAJBM6Qmd+A5PnTMYLK eovmXXYk049DOZ2iYLgdhISHKO9Dw58C3Vf5DDwomUXUIrml8L9MmnEunjMTw5Ge 1wQeN7ywlG/tS+la/4lqvUwWVoQ8tu9ofsVNXckunmbcLWbflOM1yJswqXB/oJE= =kNaj -----END PGP SIGNATURE----- --xzjdnLf1/heGxxoo--