On Tue, Dec 01, 2020 at 09:51:43AM -0800, Minchan Kim wrote:

From: Hyesoo Yu <redacted>

The heaps could be added as module, so some functions should
be exported to register dma-heaps. And dma-heap of module can use
cma area to allocate and free. However the function related cma
is not exported now. Let's export them for next patches.

Signed-off-by: Hyesoo Yu <redacted>
Signed-off-by: Minchan Kim <minchan@kernel.org>

NAK.  I really don't think any module has business gaining that
kind of low-level access to the various symbols.  I think in general
your heap can just be built-in and we should be fine.