Re: [PATCH 1/7] dma: contiguous: Turn heap registration logic around

[T.J. Mercier]

On Wed, Feb 25, 2026 at 8:42 AM Maxime Ripard <mripard@xxxxxxxxxx> wrote:
>
> The CMA heap instantiation was initially developed by having the
> contiguous DMA code call into the CMA heap to create a new instance
> every time a reserved memory area is probed.
>
> Turning the CMA heap into a module would create a dependency of the
> kernel on a module, which doesn't work.
>
> Let's turn the logic around and do the opposite: store all the reserved
> memory CMA regions into the contiguous DMA code, and provide an iterator
> for the heap to use when it probes.
>
> Signed-off-by: Maxime Ripard <mripard@xxxxxxxxxx>

Reviewed-by: T.J. Mercier <tjmercier@xxxxxxxxxx>

Thanks! I disabled this registration in the Android kernels where we
build all dmabuf heaps as modules instead of built-in, so I can undo
that if this is merged.