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-rw-r--r--include/asm-arm/dma-mapping.h18
1 files changed, 17 insertions, 1 deletions
diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h
index 9bc46b486af..abfb75b654c 100644
--- a/include/asm-arm/dma-mapping.h
+++ b/include/asm-arm/dma-mapping.h
@@ -17,7 +17,7 @@
* platforms with CONFIG_DMABOUNCE.
* Use the driver DMA support - see dma-mapping.h (dma_sync_*)
*/
-extern void consistent_sync(void *kaddr, size_t size, int rw);
+extern void consistent_sync(const void *kaddr, size_t size, int rw);
/*
* Return whether the given device DMA address mask can be supported
@@ -61,6 +61,22 @@ static inline int dma_mapping_error(dma_addr_t dma_addr)
return dma_addr == ~0;
}
+/*
+ * Dummy noncoherent implementation. We don't provide a dma_cache_sync
+ * function so drivers using this API are highlighted with build warnings.
+ */
+static inline void *
+dma_alloc_noncoherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp)
+{
+ return NULL;
+}
+
+static inline void
+dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr,
+ dma_addr_t handle)
+{
+}
+
/**
* dma_alloc_coherent - allocate consistent memory for DMA
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices