diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 29a48fb..0fc5728 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -167,6 +167,16 @@
 
 Returns: 0 if successful and a negative error if not.
 
+int
+dma_set_coherent_mask(struct device *dev, u64 mask)
+int
+pci_set_consistent_dma_mask(struct pci_device *dev, u64 mask)
+
+Checks to see if the mask is possible and updates the device
+parameters if it is.
+
+Returns: 0 if successful and a negative error if not.
+
 u64
 dma_get_required_mask(struct device *dev)