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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2007-02-12 19:26:05 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-02-12 19:26:05 +0000
commitf454aa6b90be8c5845d1e4716e12479f6ba26538 (patch)
tree41d6f27ab7b15d7ed6c83eaa035e86ce493d946c
parent017cc022b6f0a0619cc3b0bba43e1c3247b06779 (diff)
[ARM] Provide dummy noncoherent DMA API
We don't currently support the noncoherent DMA API, but it needs to be provided for kernels with devres to link. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--include/asm-arm/dma-mapping.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h
index 9bc46b486af..a59399915bc 100644
--- a/include/asm-arm/dma-mapping.h
+++ b/include/asm-arm/dma-mapping.h
@@ -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