From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 789C72F5A06 for ; Wed, 10 Dec 2025 21:47:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765403252; cv=none; b=GxKrkCsIWr7mUk9/rJ48EIFMNy3A4g5WxAFLLeUUXHyYBLGv8rAJcUIpC/FsSnx1c9jP8L4LO5d5HlHzQyNHZBZcNd9G0QDl/H7VfTNwXVCWONmAQOguHrhNpW1K9X41616gsfsIDNF8cmAq5wWGdAlfvKsgCIuYUtravYXQTZM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765403252; c=relaxed/simple; bh=PZjiIvkOk6+o0k1jYaH/EbIZrUTjsIgUkWUkgXbYUpQ=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KhqvHMVc25FDzDWTIov5A24zCYtvLEjKyX1BVj+8RH237pIGyztXDuI/Yh/Rg/XSbv5ZUeHGmDGjLukVOfEI8ONpqUOhyTK/rZX6LGPq3ByI/wCn3HLzmgBV9wcP/Slc2VqnuJN602qTm3tvhiHwzgYHIbZWeP2jW4OO/WJGjAg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=GC1b25ZO; arc=none smtp.client-ip=192.198.163.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="GC1b25ZO" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1765403250; x=1796939250; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=PZjiIvkOk6+o0k1jYaH/EbIZrUTjsIgUkWUkgXbYUpQ=; b=GC1b25ZOhbgS76LxSjLRG13oVXtK7B58ZR8xhbvFsLtHIy+V8qrga7MO zvOZ4P/NOaFRd3KAXorDPWXD0GhQlUJRBpWSDOTOprJ7eHjCILT8NSMhd o1J8rcq4HGn1IMSybiZXzbsWOXBLODbTDGhs3fmyeIM5sWo+atledQfL6 XkVAmUvJhOlnHtDUOve/lDha5G/IH9ZnrnIs6Zgw7ur3iHAf4n2A0qW3l SzLMW4rzME/yVqzsBNPHRvW58WRgc1bfuxC0wz2p55mRTlpuNa7VkS2il vLbV+hyLJNk9TnQJG7El3Ff+s8iFoPCbzJVIVmtiKbYSTPl7JMm6q8nZQ g==; X-CSE-ConnectionGUID: Zb2VhkweRYml4dVbdrSOfQ== X-CSE-MsgGUID: uHscewwkRLCUcvVTyf2iZQ== X-IronPort-AV: E=McAfee;i="6800,10657,11638"; a="78002227" X-IronPort-AV: E=Sophos;i="6.20,265,1758610800"; d="scan'208";a="78002227" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Dec 2025 13:47:29 -0800 X-CSE-ConnectionGUID: RGfebf21S8Sud7t8SjVR0w== X-CSE-MsgGUID: C06ibaVPR1WbvgtlBITVBw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,265,1758610800"; d="scan'208";a="201100128" Received: from egrumbac-mobl6.ger.corp.intel.com (HELO localhost) ([10.245.244.100]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Dec 2025 13:47:28 -0800 Date: Wed, 10 Dec 2025 23:47:25 +0200 From: Andy Shevchenko To: Christian Marangi Cc: Andrew Morton , linux-kernel@vger.kernel.org, Ilpo =?iso-8859-1?Q?J=E4rvinen?= Subject: Re: [PATCH] resource: provide 0args DEFINE_RES variant for unset resource desc Message-ID: References: <20251210180312.3869-1-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251210180312.3869-1-ansuelsmth@gmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo On Wed, Dec 10, 2025 at 07:03:07PM +0100, Christian Marangi wrote: > Provide a variant of DEFINE_RES that takes 0 arguments to inizialize an > "unset" resource descriptor. > > This should be used for the improper case of > > struct resource res = {}; > > where DEFINE_RES() should be used. > > With this new helper variant, it would result in: > > struct resource res = DEFINE_RES(); > > instead of having to define the full 3 arguments: > > struct resource res = DEFINE_RES(0, 0, IORESOURCE_UNSET); > > DEFINE_RES() with no args, will set the flags to IORESOURCE_UNSET > signaling the resource descriptor is UNSET and doesn't reflect an actual > resource currently. ... > +#define DEFINE_RES(...) \ > + CONCATENATE(__DEFINE_RES, COUNT_ARGS(__VA_ARGS__)) \ > + (__VA_ARGS__) CONCATENATE(__DEFINE_RES, COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__) Can be one line. Moreover, it will be even better to show that we imply a function call here. And this requires including args.h. -- With Best Regards, Andy Shevchenko