--- zzzz-none-000/linux-3.10.107/arch/hexagon/include/asm/cache.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/hexagon/include/asm/cache.h	2021-02-04 17:41:59.000000000 +0000
@@ -1,7 +1,7 @@
 /*
  * Cache definitions for the Hexagon architecture
  *
- * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2010-2011,2014 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -25,10 +25,12 @@
 #define L1_CACHE_SHIFT		(5)
 #define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
 
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+
 #define __cacheline_aligned	__aligned(L1_CACHE_BYTES)
 #define ____cacheline_aligned	__aligned(L1_CACHE_BYTES)
 
-/* See http://kerneltrap.org/node/15100  */
+/* See http://lwn.net/Articles/262554/ */
 #define __read_mostly
 
 #endif