On Sun, 2014-03-02 at 13:40 +0800, Grant Likely wrote:

On Fri, 28 Feb 2014 14:42:50 +0100, Marek Szyprowski [off-list ref] wrote:

quoted

This patch adds code for automated assignment of reserved memory regions
to struct device. reserved_mem->ops->device_init()/device_cleanup()
callbacks are called to perform reserved memory driver specific
initialization and cleanup

Based on previous code provided by Josh Cartwright [off-list ref]

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

Hi Marek,

I've not applied this one yet, only because there is still the open
issue of whether or not these functions should be called from drivers or
from core code. I don't actually have any problems with the content of
this patch. Once the user is sorted out I'll merge it.

Has anything more come of these patches? I see some of the series is now
in Linux 3.15, but the actual patches to let people use the feature
aren't there yet, namely patches 5 though 8.

My personal immediate interest in these is as a mechanism on arm64 to
limit CMA to a region of memory that is actually DMA-able devices (e.g.
below 4GB for 32-bit devices without an iommu).

For reference, the mail archives for this series is at
http://lkml.org/lkml/2014/2/28/237

-- 
Tixy