Introduce a no-op stub function "dma_flags_set_dmaflush". Arches
can override this if necessary to associate a "dmaflush" attribute
with a DMA-able memory region. In-flight DMA will be flushed to
host memory when a memory region with the dmaflush attribute is
written to.
Signed-off-by: Arthur Kepner <[EMAIL PROTECTED]>
--
dma-mapping.h | 7 +++++++
1 files changed, 7 insertions(+)
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 2dc21cb..594a651 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -99,4 +99,11 @@ static inline void dmam_release_declared_memory(struct
device *dev)
}
#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
+#ifndef ARCH_DOES_POSTED_DMA
+static inline int
+dma_flags_set_dmaflush(int dir) {
+ return (dir);
+}
+#endif /* ARCH_DOES_POSTED_DMA */
+
#endif
--
Arthur
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