[Linaro-mm-sig] Re: [PATCH 4/7] mm: cma: Export dma_contiguous_default_area

On Wed, Feb 25, 2026 at 8:42 AM Maxime Ripard mripard@kernel.org wrote:

The CMA dma-buf heap uses the dev_get_cma_area() inline function that would either return the content of device.cma_area or the content of dma_contiguous_default_area.

The latter holds a pointer to the default CMA region, and is stored in a public variable. However, that variable isn't exported which prevents to use dev_get_cma_area() in modules.

Since we want to turn the CMA heap into a module, let's export dma_contiguous_default_area to allow modules to use dev_get_cma_area().

Signed-off-by: Maxime Ripard mripard@kernel.org

Reviewed-by: T.J. Mercier tjmercier@google.com