dma_heap_add
EXPORT_SYMBOL_NS_GPL(dma_heap_add, "DMA_BUF_HEAP");
cma_heap->heap = dma_heap_add(&exp_info);
sys_heap = dma_heap_add(&exp_info);
h->heap = dma_heap_add(&exp_info);
struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info);