From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: dma_declare_coherent_memory on main memory
Date: Fri, 7 Dec 2018 16:34:32 +0100
Message-ID: <20181207153432.GA24917@lst.de>
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To: Shawn Guo <shawnguo@kernel.org>, Sascha Hauer <s.hauer@pengutronix.de>, Fabio Estevam <fabio.estevam@nxp.com>
Cc: linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-sh@vger.kernel.org
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Hi all,

the ARM imx27/31 ports and various sh boards use
dma_declare_coherent_memory on main memory taken from the memblock
allocator.

Is there any good reason these couldn't be switched to CMA areas?
Getting rid of these magic dma_declare_coherent_memory area would
help making the dma allocator a lot simpler.