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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 42DC3C4332F for ; Sat, 26 Nov 2022 08:13:43 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 77C9C18AA; Sat, 26 Nov 2022 09:12:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 77C9C18AA DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1669450421; bh=6dLCPjw2lnU1xHWrj+O+ys8c07lCxZyAadm3Tpe1dhI=; h=Date:From:To:Subject:References:In-Reply-To:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=fI+f5IgqoHWrhzceo2AGwiC/U6xql4pqQ8aHsVojdaj6UqiVHGHlQ8epKAp/E1d7g HRS6P/pPjV2yQmpV+KHvesqBRVMSDdkHipQiR7ezFqS9ser9707vr7gEXVTewAS/sf 2QWmSOn3zjTxaxGomVLVuIctkedQmxw9bU8IHIX8= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 18679F806F5; Sat, 26 Nov 2022 08:59:29 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 36BC0F8025D; Wed, 23 Nov 2022 18:50:21 +0100 (CET) Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id DF6D1F800BB for ; Wed, 23 Nov 2022 18:50:14 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz DF6D1F800BB Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="PsGxbrOA" 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 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: X-Mailman-Approved-At: Sat, 26 Nov 2022 08:58:52 +0100 Cc: Alexandre Belloni , Heikki Krogerus , Sean Young , "Rafael J. Wysocki" , alsa-devel@alsa-project.org, platform-driver-x86@vger.kernel.org, linux-i2c@vger.kernel.org, Andreas Noever , linux-i3c@lists.infradead.org, linux1394-devel@lists.sourceforge.net, Bard Liao , Dan Williams , Andy Shevchenko , Frank Rowand , Pierre-Louis Bossart , linux-acpi@vger.kernel.org, Alan Stern , linux-serial@vger.kernel.org, linux-input@vger.kernel.org, Won Chung , Len Brown , devicetree@vger.kernel.org, Chaitanya Kulkarni , Ira Weiny , Michael Jamet , Ming Lei , Mark Gross , Hans de Goede , Rob Herring , Jiri Slaby , Thomas Gleixner , Mauro Carvalho Chehab , Mika Westerberg , Jens Axboe , linux-block@vger.kernel.org, Jilin Yuan , "Martin K. Petersen" , Greg Kroah-Hartman , Dmitry Torokhov , linux-kernel@vger.kernel.org, Wolfram Sang , Vinod Koul , Stefan Richter , Sakari Ailus , Yehezkel Bernat , Sanyog Kale , linux-media@vger.kernel.org, Maximilian Luz , linux-usb@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" 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