[PATCH 1/2] ARM: add implementation for dma_alloc_writecombine for !CONFIG_MMU

[Lucas Stach]

This fixes build failures in builds without MMU support by providing
a fallback implementation.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 arch/arm/include/asm/dma.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index d9bce3d70e61..1ba2edf01275 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -23,6 +23,11 @@ static inline void *dma_alloc_coherent(size_t size, dma_addr_t *dma_handle)
 	return ret;
 }
 
+static inline void *dma_alloc_writecombine(size_t size, dma_addr_t *dma_handle)
+{
+	return dma_alloc_coherent(size, dma_handle);
+}
+
 static inline void dma_free_coherent(void *mem, dma_addr_t dma_handle,
 				     size_t size)
 {
-- 
2.5.0