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, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 C4132C43381 for ; Fri, 15 Mar 2019 09:07:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 86CC9218C3 for ; Fri, 15 Mar 2019 09:07:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="cezOvxZC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728716AbfCOJHG (ORCPT ); Fri, 15 Mar 2019 05:07:06 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:35274 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728667AbfCOJGx (ORCPT ); Fri, 15 Mar 2019 05:06:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=XmqefP1Bm/5cDFSiCMOElThZks0xyz9N25l34qq6/CM=; b=cezOvxZCHmY/Ce7l4r7zN+2cR W6y+Bq/SUrsZgSetS7fb1kF/yVmCLZo3wIqPBfzQZWI09v4cTbv2NaSPYS75VucxARejk8yk56IIx XtT7mxypK1C2gWEGh5rBoOvD1rr3QK/88ZqQdhk1ub4kPT7GGia2PhW9QHkvVdTYu/vVcS1RIeav3 jMroo9HpHF/eH6b/SMT99ORi1AAgdRfzBsuTtFj7YKSTmL2CZ+1RP4aPDW8+sV0PJyLo1rTQoqN2K a3kTT1f7QJHM8gxFGFfNOHZKY3tdK9jITcSRLcrExvv+MMjFNO4NTM62PL6qpxdX/hGc3YhnP8ah9 fWHfy+XWw==; Received: from hch by bombadil.infradead.org with local (Exim 4.90_1 #2 (Red Hat Linux)) id 1h4ink-0008Ha-DN; Fri, 15 Mar 2019 09:06:52 +0000 Date: Fri, 15 Mar 2019 02:06:52 -0700 From: Christoph Hellwig To: John Stultz Cc: lkml , Laura Abbott , Benjamin Gaignard , Greg KH , Sumit Semwal , Liam Mark , Brian Starkey , "Andrew F . Davis" , Chenbo Feng , Alistair Strachan , dri-devel@lists.freedesktop.org Subject: Re: [RFC][PATCH 4/5 v2] dma-buf: heaps: Add CMA heap to dmabuf heapss Message-ID: <20190315090652.GE4470@infradead.org> References: <1551819273-640-1-git-send-email-john.stultz@linaro.org> <1551819273-640-5-git-send-email-john.stultz@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1551819273-640-5-git-send-email-john.stultz@linaro.org> User-Agent: Mutt/1.9.2 (2017-12-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 05, 2019 at 12:54:32PM -0800, John Stultz wrote: > This adds a CMA heap, which allows userspace to allocate > a dma-buf of contiguous memory out of a CMA region. With my previous suggestion of DMA API usage you'd get CMA support for free in the system one instead of all this duplicate code..