1 files changed, 8 insertions, 2 deletions

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 29b028597dcd..101a2d4636be 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -13,9 +13,15 @@ enum dma_data_direction {
         DMA_NONE = 3,
 };
 
-#define DMA_BIT_MASK(n) ((1ULL<<(n))-1)
+#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
 
-#define DMA_64BIT_MASK  (~0ULL)
+/*
+ * NOTE: do not use the below macros in new code and do not add new definitions
+ * here.
+ *
+ * Instead, just open-code DMA_BIT_MASK(n) within your driver
+ */
+#define DMA_64BIT_MASK  DMA_BIT_MASK(64)
 #define DMA_48BIT_MASK  DMA_BIT_MASK(48)
 #define DMA_47BIT_MASK  DMA_BIT_MASK(47)
 #define DMA_40BIT_MASK  DMA_BIT_MASK(40)