1 files changed, 5 insertions, 0 deletions

diff --git a/include/asm-sh/io.h b/include/asm-sh/io.h
index 27dba653cbe7..377160b86295 100644
--- a/include/asm-sh/io.h
+++ b/include/asm-sh/io.h
@@ -216,6 +216,7 @@ static inline void ctrl_delay(void)
 
 #define IO_SPACE_LIMIT 0xffffffff
 
+#ifdef CONFIG_MMU
 /*
  * Change virtual addresses to physical addresses and vv.
  * These are trivial on the 1:1 Linux/SuperH mapping
@@ -229,6 +230,10 @@ static inline void *phys_to_virt(unsigned long address)
 {
         return (void *)P1SEGADDR(address);
 }
+#else
+#define phys_to_virt(address)   ((void *)(address))
+#define virt_to_phys(address)   ((unsigned long)(address))
+#endif
 
 #define virt_to_bus virt_to_phys
 #define bus_to_virt phys_to_virt