linux-kernel - Re: [PATCH v12 4/5] dma-buf: heaps: Add CMA heap to dmabuf heaps

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Message-ID: <20191018112124.grjgqrn3ckuc7n4v@DESKTOP-E1NTVVP.localdomain>
Date:   Fri, 18 Oct 2019 11:21:26 +0000
From:   Brian Starkey <Brian.Starkey@....com>
To:     John Stultz <john.stultz@...aro.org>
CC:     lkml <linux-kernel@...r.kernel.org>,
        Laura Abbott <labbott@...hat.com>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Liam Mark <lmark@...eaurora.org>,
        Pratik Patel <pratikp@...eaurora.org>,
        Vincent Donnefort <Vincent.Donnefort@....com>,
        Sudipto Paul <Sudipto.Paul@....com>,
        "Andrew F . Davis" <afd@...com>,
        Christoph Hellwig <hch@...radead.org>,
        Chenbo Feng <fengc@...gle.com>,
        Alistair Strachan <astrachan@...gle.com>,
        Hridya Valsaraju <hridya@...gle.com>,
        Hillf Danton <hdanton@...a.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        nd <nd@....com>
Subject: Re: [PATCH v12 4/5] dma-buf: heaps: Add CMA heap to dmabuf heaps

On Fri, Oct 18, 2019 at 05:23:22AM +0000, John Stultz wrote:
> This adds a CMA heap, which allows userspace to allocate
> a dma-buf of contiguous memory out of a CMA region.
> 
> This code is an evolution of the Android ION implementation, so
> thanks to its original author and maintainters:
>   Benjamin Gaignard, Laura Abbott, and others!
> 
> NOTE: This patch only adds the default CMA heap. We will enable
> selectively adding other CMA memory regions to the dmabuf heaps
> interface with a later patch (which requires a dt binding)

That'll teach me for reading my email in FIFO order.

This approach makes sense to me.

-Brian