devres: add devm_memremap

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/include/linux/io.h b/include/linux/io.h
index 3fcf625..d8d749a 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -80,6 +80,10 @@
 			const unsigned char *signature, int length);
 void devm_ioremap_release(struct device *dev, void *res);
 
+void *devm_memremap(struct device *dev, resource_size_t offset,
+		size_t size, unsigned long flags);
+void devm_memunmap(struct device *dev, void *addr);
+
 /*
  * Some systems do not have legacy ISA devices.
  * /dev/port is not a valid interface on these systems.