--- zzzz-none-000/linux-3.10.107/arch/hexagon/kernel/dma.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/hexagon/kernel/dma.c	2021-02-04 17:41:59.000000000 +0000
@@ -44,17 +44,6 @@
 }
 EXPORT_SYMBOL(dma_supported);
 
-int dma_set_mask(struct device *dev, u64 mask)
-{
-	if (!dev->dma_mask || !dma_supported(dev, mask))
-		return -EIO;
-
-	*dev->dma_mask = mask;
-
-	return 0;
-}
-EXPORT_SYMBOL(dma_set_mask);
-
 static struct gen_pool *coherent_pool;