diff --git a/[refs] b/[refs]
index 1352d48367ac..06dd5f0f72e2 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6a5c7be5e484bda5b2639fedf7dbe3f25c15c962
+refs/heads/master: 3a8f7558e475b68254d8bc3a2211f3f89bf67a71
diff --git a/trunk/include/linux/dma-mapping.h b/trunk/include/linux/dma-mapping.h
index 347fdc32177a..aa32fecd1d34 100644
--- a/trunk/include/linux/dma-mapping.h
+++ b/trunk/include/linux/dma-mapping.h
@@ -41,6 +41,9 @@ struct dma_map_ops {
 	int (*mapping_error)(struct device *dev, dma_addr_t dma_addr);
 	int (*dma_supported)(struct device *dev, u64 mask);
 	int (*set_dma_mask)(struct device *dev, u64 mask);
+#ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
+	u64 (*get_required_mask)(struct device *dev);
+#endif
 	int is_phys;
 };