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1config DMABUF_HEAPS_SYSTEM2 bool "DMA-BUF System Heap"3 depends on DMABUF_HEAPS4 help5 Choose this option to enable the system dmabuf heap. The system heap6 is backed by pages from the buddy allocator. If in doubt, say Y.7 8config DMABUF_HEAPS_CMA9 bool "DMA-BUF CMA Heap"10 depends on DMABUF_HEAPS && DMA_CMA11 help12 Choose this option to enable dma-buf CMA heap. This heap is backed13 by the Contiguous Memory Allocator (CMA). If your system has these14 regions, you should say Y here.15