[Linaro-mm-sig] Re: [PATCH v3 06/11] mm/cma: Allow dynamically creating CMA areas

On 7/7/26 12:02, Marek Szyprowski wrote:

On 01.07.2026 18:08, Thierry Reding wrote:

...

From: Thierry Reding treding@nvidia.com

There is no technical reason why there should be a limited number of CMA regions, so extract some code into helpers and use them to create extra functions (cma_create() and cma_free()) that allow creating and freeing, respectively, CMA regions dynamically at runtime.

Well, the technical reason for not creating cma regions dynamically at runtime is that on some architectures (like 32bit ARM) the early fixup for the region is needed to make it functional for DMA.

Can you point me at the code that does that? Thanks!