diff --git a/include/linux/io-mapping.h b/include/linux/io-mapping.h
index cbc2f0cd631ba1f58b4c5f937dbcffecab48a36a..0adb0f91568c1cfd407b1e88c1dce5b39d0080d5 100644
--- a/include/linux/io-mapping.h
+++ b/include/linux/io-mapping.h
@@ -91,8 +91,11 @@ io_mapping_unmap_atomic(void *vaddr)
 static inline void *
 io_mapping_map_wc(struct io_mapping *mapping, unsigned long offset)
 {
+	resource_size_t phys_addr;
+
 	BUG_ON(offset >= mapping->size);
-	resource_size_t phys_addr = mapping->base + offset;
+	phys_addr = mapping->base + offset;
+
 	return ioremap_wc(phys_addr, PAGE_SIZE);
 }