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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 96FEFC433EF for ; Tue, 11 Jan 2022 13:56:21 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 0B7776B0072; Tue, 11 Jan 2022 08:56:21 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 066E76B0073; Tue, 11 Jan 2022 08:56:21 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EE69D6B0074; Tue, 11 Jan 2022 08:56:20 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0171.hostedemail.com [216.40.44.171]) by kanga.kvack.org (Postfix) with ESMTP id E07726B0072 for ; Tue, 11 Jan 2022 08:56:20 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 9857D181CA092 for ; Tue, 11 Jan 2022 13:56:20 +0000 (UTC) X-FDA: 79018155720.24.A3C8FD5 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf02.hostedemail.com (Postfix) with ESMTP id C3B3A8001E for ; Tue, 11 Jan 2022 13:56:19 +0000 (UTC) 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=9x3T+OG12IkfXXX5SdbrD0z40LWuqe0Q6mgSeNzWLM8=; b=TaT6fy8pCvO5SdKMnaN7SpBmY9 /ZLyF3tWCXHLpuit9luOiZ+ndBhQ7LL/wNEHrb38QTJZ6YpADTaPY1r1YOSR00c9Kbj2WgXFKfoye AWqf5FCJoK95CUarLnHHHQ+mltrKuJLW/m7eN2QQhyn7ZyRMaP6Z5ZdVjN6nHIgPoWECjHIV9dkCB +ZfRtOv6Aex8dBEReg0SGmxUnklwwvLlMM42PR8Xw3SOfokz55fFhdgE9ORE7rzOEVfdu079sxZ6X tK+DFC4Njr3sRPVXX9X+tuYJmqg8+Ur/DcvJQhMYgoFj0Bmnsfpi5Rk6ot0HbCwGDYQSQnGAGX52y Zz45MQfg==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1n7HdA-003Id6-MO; Tue, 11 Jan 2022 13:56:08 +0000 Date: Tue, 11 Jan 2022 13:56:08 +0000 From: Matthew Wilcox To: Thomas Zimmermann Cc: linux-kernel@vger.kernel.org, nvdimm@lists.linux.dev, linux-rdma@vger.kernel.org, John Hubbard , dri-devel@lists.freedesktop.org, Ming Lei , linux-block@vger.kernel.org, linux-mm@kvack.org, Jason Gunthorpe , netdev@vger.kernel.org, Joao Martins , Logan Gunthorpe , Christoph Hellwig Subject: Re: Phyr Starter Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: C3B3A8001E X-Stat-Signature: ni1snk37pw34ytfgmdh97bgwxorb4zgj Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=TaT6fy8p; spf=none (imf02.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-HE-Tag: 1641909379-144818 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jan 11, 2022 at 12:40:10PM +0100, Thomas Zimmermann wrote: > Hi > > Am 10.01.22 um 20:34 schrieb Matthew Wilcox: > > TLDR: I want to introduce a new data type: > > > > struct phyr { > > phys_addr_t addr; > > size_t len; > > }; > > Did you look at struct dma_buf_map? [1] Thanks. I wasn't aware of that. It doesn't seem to actually solve the problem, in that it doesn't carry any length information. Did you mean to point me at a different structure?