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Date: Thu, 06 Oct 2011 16:18:36 +0200
From: Marek Szyprowski <m.szyprowski@samsung.com>
Subject: RE: [PATCH 7/7] ARM: integrate CMA with DMA-mapping subsystem
In-reply-to: <1317909290-29832-8-git-send-email-m.szyprowski@samsung.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>, linux-kernel@vger.kernel.org,
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        linux-mm@kvack.org, linaro-mm-sig@lists.linaro.org
Cc: "'Michal Nazarewicz'" <mina86@mina86.com>,
        "'Kyungmin Park'" <kyungmin.park@samsung.com>,
        "'Russell King'" <linux@arm.linux.org.uk>,
        "'Andrew Morton'" <akpm@linux-foundation.org>,
        "'KAMEZAWA Hiroyuki'" <kamezawa.hiroyu@jp.fujitsu.com>,
        "'Ankita Garg'" <ankita@in.ibm.com>,
        "'Daniel Walker'" <dwalker@codeaurora.org>,
        "'Mel Gorman'" <mel@csn.ul.ie>, "'Arnd Bergmann'" <arnd@arndb.de>,
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Hello,

On Thursday, October 06, 2011 3:55 PM Marek Szyprowski wrote:

> This patch adds support for CMA to dma-mapping subsystem for ARM
> architecture. By default a global CMA area is used, but specific devices
> are allowed to have their private memory areas if required (they can be
> created with dma_declare_contiguous() function during board
> initialization).
> 
> Contiguous memory areas reserved for DMA are remapped with 2-level page
> tables on boot. Once a buffer is requested, a low memory kernel mapping
> is updated to to match requested memory access type.
> 
> GFP_ATOMIC allocations are performed from special pool which is created
> early during boot. This way remapping page attributes is not needed on
> allocation time.
> 
> CMA has been enabled unconditionally for ARMv6+ systems.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

Please ignore this patch. The patch named as "[PATCH 8/9] ARM: integrate
CMA with DMA-mapping subsystem" in this thread is the correct one.

Best regards
-- 
Marek Szyprowski
Samsung Poland R&D Center