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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 77A45C432C0 for ; Tue, 26 Nov 2019 12:51:45 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 41A5E20722 for ; Tue, 26 Nov 2019 12:51:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="RvVzSwrz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 41A5E20722 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 1651887FDE; Tue, 26 Nov 2019 12:51:45 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cn9mDZCjfNMc; Tue, 26 Nov 2019 12:51:44 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by hemlock.osuosl.org (Postfix) with ESMTP id 838AC87FC3; Tue, 26 Nov 2019 12:51:44 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 69D8FC0880; Tue, 26 Nov 2019 12:51:44 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id F05A5C0878 for ; Tue, 26 Nov 2019 12:51:42 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id D34E4204EB for ; Tue, 26 Nov 2019 12:51:42 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2IL9QwRtyf1m for ; Tue, 26 Nov 2019 12:51:42 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by silver.osuosl.org (Postfix) with ESMTPS id 432FB2040B for ; Tue, 26 Nov 2019 12:51:42 +0000 (UTC) Received: from localhost (unknown [193.47.165.251]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 69E61206BF; Tue, 26 Nov 2019 12:51:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574772702; bh=5nAvciWjljSlo0MRrEzGu4vA1rOXmiskCOHgf/ck+dw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RvVzSwrzBkQ8faXu4UMgM41piS9lOzszU7IBHz2T7OmjxLWK42N9HPWM4t8WYcewV PUlUbBehr242PJuxMMaPAyqmIpZMmTP8A2xzlNoVjXorIj5w1xm/6m7g83zpY3rYyX 9x/57jz1HLZHD/qWHYTPD9Y14fFMXbPWmvXEBy20= Date: Tue, 26 Nov 2019 14:51:37 +0200 From: Leon Romanovsky To: Nicolas Saenz Julienne Subject: Re: [PATCH v3 1/7] linux/log2.h: Add roundup/rounddown_pow_two64() family of functions Message-ID: <20191126125137.GA10331@unreal> References: <20191126091946.7970-1-nsaenzjulienne@suse.de> <20191126091946.7970-2-nsaenzjulienne@suse.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191126091946.7970-2-nsaenzjulienne@suse.de> User-Agent: Mutt/1.12.1 (2019-06-15) Cc: Heiko Stuebner , linux-pci@vger.kernel.org, Shawn Lin , Hanjun Guo , Frank Rowand , Christoph Hellwig , f.fainelli@gmail.com, linux-rockchip@lists.infradead.org, linux-rdma@vger.kernel.org, maz@kernel.org, phil@raspberrypi.org, linux-acpi@vger.kernel.org, Len Brown , devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, Bjorn Helgaas , linux-arm-kernel@lists.infradead.org, mbrugger@suse.com, netdev@vger.kernel.org, "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, jeremy.linton@arm.com, iommu@lists.linux-foundation.org, Rob Herring , wahrenst@gmx.net, james.quinlan@broadcom.com, Sudeep Holla , Robin Murphy , "David S. Miller" , Tariq Toukan X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Tue, Nov 26, 2019 at 10:19:39AM +0100, Nicolas Saenz Julienne wrote: > Some users need to make sure their rounding function accepts and returns > 64bit long variables regardless of the architecture. Sadly > roundup/rounddown_pow_two() takes and returns unsigned longs. Create a > new generic 64bit variant of the function and cleanup rougue custom > implementations. Is it possible to create general roundup/rounddown_pow_two() which will work correctly for any type of variables, instead of creating special variant for every type? Thanks _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu