Re: [RFC][PATCH 1/2] mm: cma: Export cma symbols for cma heap as a module

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On Mon, Oct 28, 2019 at 12:12 PM <sspatil@xxxxxxxxxx> wrote:
> On Fri, Oct 25, 2019 at 11:48:33PM +0000, John Stultz wrote:
> > --- a/kernel/dma/contiguous.c
> > +++ b/kernel/dma/contiguous.c
> > @@ -31,6 +31,7 @@
> >  #endif
> >
> >  struct cma *dma_contiguous_default_area;
> > +EXPORT_SYMBOL(dma_contiguous_default_area);
>
> I didn't need to do this for the (out-of-tree) ion cma heap [1].
> Any reason why you had to?

Its likely due to the changes I made in the separate
non-default-CMA-region patch set. Earlier I had gotten away with just
your change, but in testing before I sent this series, I hit the build
error and quickly added the export before sending.

I'll revise and respin this. Mostly just wanting to get initial
feedback on the dmabuf-heaps-as-modules bit, so I didn't take as much
care as I should have with the exports here.

thanks
-john
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