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 25CA8C4332F for ; Wed, 23 Nov 2022 17:49:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239184AbiKWRtw (ORCPT ); Wed, 23 Nov 2022 12:49:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239147AbiKWRtu (ORCPT ); Wed, 23 Nov 2022 12:49:50 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 362F1BE266; Wed, 23 Nov 2022 09:49:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=3fTJtAhCYVf4T6+HaU0lUlvFevgLRUqxFHqxF0+M6mQ=; b=PsGxbrOAWhmOQwY2+t8gUj0lt8 YgJWe0wCbRmKhkaNMxQrEv6bl/KfCT3fTToiLGDu7OHzaxHKam06wEd44l0yMXWihhru3JN5dbOz+ z7yp7UE/E/I/YneKKLNgOcj5+nccs/cC3guuN8LzGUby6Doiinv0fCWvvxMlXivAGj6u6PF+riLi2 LeA79P9G/yt6pxvybg6aQ4YZkhos9sIpY/uuOe1/sV+1gr3feJnCNyFNIxwprdY1Hq9cLd3Ygp5jJ f9FYMdZAoZHQ1ovdLLTBLm/NC7Jcs4zIddL8Sm83AguCkSkYweKgbyn70U1T/J5pD3EC9oSGcxcc2 L9pWqQRQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1oxtsO-007sVm-GW; Wed, 23 Nov 2022 17:49:36 +0000 Date: Wed, 23 Nov 2022 17:49:36 +0000 From: Matthew Wilcox To: Jason Gunthorpe Cc: Greg Kroah-Hartman , Maximilian Luz , Andy Shevchenko , linux-kernel@vger.kernel.org, Jens Axboe , "Rafael J. Wysocki" , Len Brown , Stefan Richter , Wolfram Sang , Alexandre Belloni , Dmitry Torokhov , Sean Young , Mauro Carvalho Chehab , Rob Herring , Frank Rowand , Hans de Goede , Mark Gross , Vinod Koul , Bard Liao , Pierre-Louis Bossart , Sanyog Kale , Andreas Noever , Michael Jamet , Mika Westerberg , Yehezkel Bernat , Jiri Slaby , Heikki Krogerus , "Martin K. Petersen" , Chaitanya Kulkarni , Ming Lei , Jilin Yuan , Alan Stern , Sakari Ailus , Thomas Gleixner , Ira Weiny , Dan Williams , Won Chung , alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, linux-block@vger.kernel.org, linux-i2c@vger.kernel.org, linux-i3c@lists.infradead.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, linux-serial@vger.kernel.org, linux-usb@vger.kernel.org, linux1394-devel@lists.sourceforge.net, platform-driver-x86@vger.kernel.org Subject: Re: [PATCH 3/5] driver core: make struct device_type.uevent() take a const * Message-ID: References: <20221123122523.1332370-1-gregkh@linuxfoundation.org> <20221123122523.1332370-3-gregkh@linuxfoundation.org> <711d5275-7e80-c00d-0cdc-0f3d52175361@gmail.com> <97be39ed-3cea-d55a-caa6-c2652baef399@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org On Wed, Nov 23, 2022 at 01:29:56PM -0400, Jason Gunthorpe wrote: > #define generic_container_of(in_type, in, out_type, out_member) \ > _Generic(in, \ > const in_type *: ((const out_type *)container_of(in, out_type, out_member)), \ > in_type *: ((out_type *)container_of(in, out_type, out_member)) \ > ) There's a neat trick I found in seqlock.h: #define generic_container_of(in_t, in, out_t, m) \ _Generic(*(in), \ const in_t: ((const out_t *)container_of(in, out_t, m)), \ in_t: ((out_t *)container_of(in, out_type, m)) \ ) and now it fits in 80 columns ;-) > #define kobj_to_dev(__kobj) \ > generic_container_of(struct kobject, __kobj, struct device, kobj) > > Jason