[RFC/PATCH 1/4] arm64: Provide default implementation for dma_{alloc, free}_attrs

[Damian Hobson-Garcia]

Most architectures that define CONFIG_HAVE_DMA, have implementations for
both dma_alloc_attrs() and dma_free_attrs().  All achitectures that do
not define CONFIG_HAVE_DMA also have both of these definitions provided by
dma-mapping-broken.h.

Add default implementations for these functions on arm64.

Signed-off-by: Damian Hobson-Garcia <dhobsong at igel.co.jp>
---
 arch/arm64/include/asm/dma-mapping.h |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 9947768..65ab181 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -81,6 +81,9 @@ static inline void dma_mark_clean(void *addr, size_t size)
 {
 }
 
+#define dma_alloc_attrs(d, s, h, f, a) dma_alloc_coherent(d, s, h, f)
+#define dma_free_attrs(d, s, h, f, a) dma_free_coherent(d, s, h, f)
+
 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 				       dma_addr_t *dma_handle, gfp_t flags)
 {
-- 
1.7.5.4