From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matti Vaittinen Subject: Re: [PATCH v7 1/4] mfd: bd71837: mfd driver for ROHM BD71837 PMIC Date: Tue, 26 Jun 2018 15:03:06 +0300 Message-ID: <20180626120306.GD2118@localhost.localdomain> References: <7e1888375c979accc402e9ddd7316e528b2ac52c.1529404894.git.matti.vaittinen@fi.rohmeurope.com> <20180626112455.GC2118@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Enric Balletbo Serra Cc: Michael Turquette , sboyd@kernel.org, Rob Herring , Mark Rutland , Lee Jones , Liam Girdwood , Mark Brown , mazziesaccount@gmail.com, Arnd Bergmann , Dmitry Torokhov , Sebastian Reichel , chenjh@rock-chips.com, andrew.smirnov@gmail.com, Linus Walleij , Kate Stewart , Heiko =?iso-8859-1?Q?St=FCbner?= , Greg Kroah-Hartman , linux-clk@vger.kernel.org, "devicetree@vger.kernel.org" , linux-kernel , linux-input@vger.kernel. List-Id: linux-input@vger.kernel.org Hello Again Eric, On Tue, Jun 26, 2018 at 01:40:40PM +0200, Enric Balletbo Serra wrote: > Hi Matti, > Missatge de Matti Vaittinen del > dia dt., 26 de juny 2018 a les 13:25: > > On Tue, Jun 26, 2018 at 11:06:33AM +0200, Enric Balletbo Serra wrote: > > > Missatge de Matti Vaittinen del > > > dia dt., 19 de juny 2018 a les 12:57: > > > > > > +static const struct of_device_id bd71837_of_match[] = { > > > > + { .compatible = "rohm,bd71837", .data = (void *)0}, > > > > + { }, > > > > > > nit: { /* sentinel */ } > > > > I am sorry but I didn't quite get the point here. Could you please > > explain what did you expect to be added here? > > > > It's a nit but It is a good practice to specify that the last entry is > a sentinel. Just this. > > +static const struct of_device_id bd71837_of_match[] = { > + { .compatible = "rohm,bd71837", .data = (void *)0}, > + { /* sentinel */ } > +}; Oh, I see. Finally something I can disagree =) I quickly opened few random drivers which declare match table. None of them practiced this good practice. So I guess it is not such a standard after all. And I guess the meaning of last entry in match table should be quite obvious. Adding the comment /* sentinel */ sounds like stating the obvious at best - at worst it gets one just to wonder what the "sentinel" means =) > > And just noticed, is .data = (void *)0 really required? As static structs should be initialized to zero I'd say it is not required. Will remove this. Thanks for pointing this out. Br, Matti Vaittinen