Export the dma-buf heap functions to allow them to be used by the OP-TEE
driver. The OP-TEE driver wants to register and manage specific secure
DMA heaps with it.

Reviewed-by: Sumit Garg <redacted>
Reviewed-by: T.J. Mercier <tjmercier@google.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Jens Wiklander <redacted>
---
 drivers/dma-buf/dma-heap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index 3cbe87d4a464..8ab49924f8b7 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c

@@ -11,6 +11,7 @@
 #include <linux/dma-buf.h>
 #include <linux/dma-heap.h>
 #include <linux/err.h>
+#include <linux/export.h>
 #include <linux/list.h>
 #include <linux/nospec.h>
 #include <linux/syscalls.h>

@@ -202,6 +203,7 @@ void *dma_heap_get_drvdata(struct dma_heap *heap)
 {
 	return heap->priv;
 }
+EXPORT_SYMBOL_NS_GPL(dma_heap_get_drvdata, "DMA_BUF_HEAP");
 
 /**
  * dma_heap_get_name - get heap name

@@ -214,6 +216,7 @@ const char *dma_heap_get_name(struct dma_heap *heap)
 {
 	return heap->name;
 }
+EXPORT_SYMBOL_NS_GPL(dma_heap_get_name, "DMA_BUF_HEAP");
 
 /**
  * dma_heap_add - adds a heap to dmabuf heaps

@@ -303,6 +306,7 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
 	kfree(heap);
 	return err_ret;
 }
+EXPORT_SYMBOL_NS_GPL(dma_heap_add, "DMA_BUF_HEAP");