[Xen-devel] [PATCH v3 04/10] arm: introduce a global dma_ops pointer

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Initially set dma_ops to arm_dma_ops.


Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
CC: will.deacon@xxxxxxx
CC: linux@xxxxxxxxxxxxxxxx


Changes in v3:
-  keep using arm_dma_ops in dmabounce.
---
 arch/arm/include/asm/dma-mapping.h |    3 ++-
 arch/arm/mm/dma-mapping.c          |    3 +++
 2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/arch/arm/include/asm/dma-mapping.h 
b/arch/arm/include/asm/dma-mapping.h
index 5b8eef9..5c130bc 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -12,6 +12,7 @@
 #include <asm/memory.h>
 
 #define DMA_ERROR_CODE (~0)
+extern struct dma_map_ops *dma_ops;
 extern struct dma_map_ops arm_dma_ops;
 extern struct dma_map_ops arm_coherent_dma_ops;
 
@@ -19,7 +20,7 @@ static inline struct dma_map_ops *get_dma_ops(struct device 
*dev)
 {
        if (dev && dev->archdata.dma_ops)
                return dev->archdata.dma_ops;
-       return &arm_dma_ops;
+       return dma_ops;
 }
 
 static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 7f9b179..870b12c 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -141,6 +141,9 @@ struct dma_map_ops arm_dma_ops = {
 };
 EXPORT_SYMBOL(arm_dma_ops);
 
+struct dma_map_ops *dma_ops = &arm_dma_ops;
+EXPORT_SYMBOL(dma_ops);
+
 static void *arm_coherent_dma_alloc(struct device *dev, size_t size,
        dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs);
 static void arm_coherent_dma_free(struct device *dev, size_t size, void 
*cpu_addr,
-- 
1.7.2.5


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