diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 7b213fa..86b778d 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -46,6 +46,8 @@
 #define CREATE_TRACE_POINTS
 #include <trace/events/spi.h>
 
+#include "internals.h"
+
 static DEFINE_IDR(spi_master_idr);
 
 static void spidev_release(struct device *dev)
@@ -740,9 +742,9 @@ static void spi_set_cs(struct spi_device *spi, bool enable)
 }
 
 #ifdef CONFIG_HAS_DMA
-static int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
-		       struct sg_table *sgt, void *buf, size_t len,
-		       enum dma_data_direction dir)
+int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
+		struct sg_table *sgt, void *buf, size_t len,
+		enum dma_data_direction dir)
 {
 	const bool vmalloced_buf = is_vmalloc_addr(buf);
 	unsigned int max_seg_size = dma_get_max_seg_size(dev);
@@ -821,8 +823,8 @@ static int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
 	return 0;
 }
 
-static void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev,
-			  struct sg_table *sgt, enum dma_data_direction dir)
+void spi_unmap_buf(struct spi_controller *ctlr, struct device *dev,
+		   struct sg_table *sgt, enum dma_data_direction dir)
 {
 	if (sgt->orig_nents) {
 		dma_unmap_sg(dev, sgt->sgl, sgt->orig_nents, dir);
@@ -907,19 +909,6 @@ static int __spi_unmap_msg(struct spi_controller *ctlr, struct spi_message *msg)
 	return 0;
 }
 #else /* !CONFIG_HAS_DMA */
-static inline int spi_map_buf(struct spi_controller *ctlr, struct device *dev,
-			      struct sg_table *sgt, void *buf, size_t len,
-			      enum dma_data_direction dir)
-{
-	return -EINVAL;
-}
-
-static inline void spi_unmap_buf(struct spi_controller *ctlr,
-				 struct device *dev, struct sg_table *sgt,
-				 enum dma_data_direction dir)
-{
-}
-
 static inline int __spi_map_msg(struct spi_controller *ctlr,
 				struct spi_message *msg)
 {