diff --git a/include/asm-sh/io.h b/include/asm-sh/io.h
index adc3f81..ca598a6 100644
--- a/include/asm-sh/io.h
+++ b/include/asm-sh/io.h
@@ -261,5 +261,10 @@
 
 }
 
+static inline phys_addr_t virt_to_phys(void * vaddr)
+{
+	return (phys_addr_t)(vaddr);
+}
+
 #endif	/* __KERNEL__ */
 #endif	/* __ASM_SH_IO_H */