diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c
index e8b65f645aeda7de719535b794764436e5447f20..a130b2278e92ca47430df7e1040b6db62d2806c9 100644
--- a/arch/sh/mm/ioremap.c
+++ b/arch/sh/mm/ioremap.c
@@ -33,8 +33,9 @@
  * have to convert them into an offset in a page-aligned mapping, but the
  * caller shouldn't need to know that small detail.
  */
-void __iomem *__ioremap_caller(unsigned long phys_addr, unsigned long size,
-			       unsigned long flags, void *caller)
+void __iomem * __init_refok
+__ioremap_caller(unsigned long phys_addr, unsigned long size,
+		 unsigned long flags, void *caller)
 {
 	struct vm_struct *area;
 	unsigned long offset, last_addr, addr, orig_addr;