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Subject[PATCH v3 04/10] arm: introduce a global dma_ops pointer
Date
Initially set dma_ops to arm_dma_ops.


Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
CC: will.deacon@arm.com
CC: linux@arm.linux.org.uk


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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