dma: import linux/dma-direction.h to consolidate enum dma_data_direction
Import include/linux/dma-direction.h from Linux 4.13-rc7 and delete
duplicated definitions of enum dma_data_direction.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
diff --git a/arch/nds32/include/asm/dma-mapping.h b/arch/nds32/include/asm/dma-mapping.h
index 25e5a1b..a627306 100644
--- a/arch/nds32/include/asm/dma-mapping.h
+++ b/arch/nds32/include/asm/dma-mapping.h
@@ -7,11 +7,7 @@
#ifndef __ASM_NDS_DMA_MAPPING_H
#define __ASM_NDS_DMA_MAPPING_H
-enum dma_data_direction {
- DMA_BIDIRECTIONAL = 0,
- DMA_TO_DEVICE = 1,
- DMA_FROM_DEVICE = 2,
-};
+#include <linux/dma-direction.h>
static void *dma_alloc_coherent(size_t len, unsigned long *handle)
{