dma-mapping: make support for dma ops optional
Avoid the overhead of the dma ops support for tiny builds that only
use the direct mapping.
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Alexey Kardashevskiy <[email protected]>
Reviewed-by: Alexey Kardashevskiy <[email protected]>
diff --git a/include/linux/device.h b/include/linux/device.h
index 15460a5..4c4af98 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -568,8 +568,9 @@ struct device {
#ifdef CONFIG_GENERIC_MSI_IRQ
struct list_head msi_list;
#endif
-
+#ifdef CONFIG_DMA_OPS
const struct dma_map_ops *dma_ops;
+#endif
u64 *dma_mask; /* dma mask (if dma'able device) */
u64 coherent_dma_mask;/* Like dma_mask, but for
alloc_coherent mappings as
