--- zzzz-none-000/linux-3.10.107/arch/hexagon/include/asm/io.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/hexagon/include/asm/io.h	2021-02-04 17:41:59.000000000 +0000
@@ -24,14 +24,9 @@
 #ifdef __KERNEL__
 
 #include <linux/types.h>
-#include <linux/delay.h>
-#include <linux/vmalloc.h>
-#include <asm/string.h>
-#include <asm/mem-layout.h>
 #include <asm/iomap.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
 
 /*
  * We don't have PCI yet.
@@ -189,6 +184,8 @@
 #define writew_relaxed __raw_writew
 #define writel_relaxed __raw_writel
 
+#define mmiowb()
+
 /*
  * Need an mtype somewhere in here, for cache type deals?
  * This is probably too long for an inline.