From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BC05C46467 for ; Wed, 11 Jan 2023 12:15:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229509AbjAKMPC (ORCPT ); Wed, 11 Jan 2023 07:15:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232036AbjAKMO7 (ORCPT ); Wed, 11 Jan 2023 07:14:59 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D38C64CC; Wed, 11 Jan 2023 04:14:59 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id C4EBAB81BDF; Wed, 11 Jan 2023 12:14:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12212C433D2; Wed, 11 Jan 2023 12:14:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1673439296; bh=LETd3pG99Kwo3bLxrESekaid/mKi6lfOrfsazSIu5hw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1Vz8dGLe8d+W9N/4DzOLskp3KhYK/X0RR9uwlGMLbOh7LCw2BMxB4mmmRFaSUbQyD b8H4HyfZ9UZZ4Yd7SdLo54LSWsGFjxrUvN/ranrnZVTMQPcBvAJH0RaJUGyCVM1cJB eYDPgm5hmp7Gw5xRArCBEsybB3TOkSBSs2CscA20= Date: Wed, 11 Jan 2023 13:14:52 +0100 From: Greg Kroah-Hartman To: Maximilian Luz Cc: linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org Subject: Re: [PATCH v2 03/16] platform/surface: aggregator: move to_ssam_device() to use container_of_const() Message-ID: References: <20230111113018.459199-1-gregkh@linuxfoundation.org> <20230111113018.459199-4-gregkh@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org On Wed, Jan 11, 2023 at 01:02:01PM +0100, Maximilian Luz wrote: > On 1/11/23 12:30, Greg Kroah-Hartman wrote: > > The driver core is changing to pass some pointers as const, so move > > to_ssam_device() to use container_of_const() to handle this change. > > to_ssam_device() now properly keeps the const-ness of the pointer passed > > into it, while as before it could be lost. > > > > Cc: Maximilian Luz > > Cc: platform-driver-x86@vger.kernel.org > > Signed-off-by: Greg Kroah-Hartman > > --- > > include/linux/surface_aggregator/device.h | 5 +---- > > 1 file changed, 1 insertion(+), 4 deletions(-) > > > > diff --git a/include/linux/surface_aggregator/device.h b/include/linux/surface_aggregator/device.h > > index 46c45d1b6368..24151a0e2c96 100644 > > --- a/include/linux/surface_aggregator/device.h > > +++ b/include/linux/surface_aggregator/device.h > > @@ -229,10 +229,7 @@ static inline bool is_ssam_device(struct device *d) > > * Return: Returns a pointer to the &struct ssam_device wrapping the given > > * device @d. > > */ > > -static inline struct ssam_device *to_ssam_device(struct device *d) > > -{ > > - return container_of(d, struct ssam_device, dev); > > -} > > +#define to_ssam_device(d) container_of_const(d, struct ssam_device, dev) > > /** > > * to_ssam_device_driver() - Casts the given device driver to a SSAM client > > A small note in addition to the comment by Hans: I think it might be a > good idea to convert the to_ssam_device_driver() function as well. I > could also send this in as a follow-up patch. Sure, that can be a follow-on patch as it's not needed here. thanks, greg k-h