linux-kernel - Re: [PATCH 1/1] of: of_reserved_mem: Ensure cma reserved region not cross the low/high memory

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Message-ID: <CAL_JsqLHh96D0VULuYfYC1P5K_Bbz6iRjizuYP3Mb6bdERbDnA@mail.gmail.com>
Date:   Wed, 14 Dec 2016 14:45:19 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Jason Liu <jason.hui.liu@....com>
Cc:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Laura Abbott <labbott@...hat.com>,
        Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH 1/1] of: of_reserved_mem: Ensure cma reserved region not
 cross the low/high memory

On Wed, Nov 23, 2016 at 5:37 AM, Jason Liu <jason.hui.liu@....com> wrote:
> Need ensure the cma reserved region not cross the low/high memory boundary
> when using the dynamic allocation methond through device-tree, otherwise,
> kernel will fail to boot up when cma reserved region cross how/high mem.

The kernel command line code setting CMA already deals with this. Why
don't we just call the CMA code (cma_declare_contiguous) to deal with
this?

Rob