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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 <>,
Subject: Re: [RFC][PATCH 4/5 v2] dma-buf: heaps: Add CMA heap to dmabuf heapss

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..

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