1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 786e7b8cece..83aa81297ea 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -184,5 +184,9 @@ extern void __devm_release_region(struct device *dev, struct resource *parent,
 extern int iomem_map_sanity_check(resource_size_t addr, unsigned long size);
 extern int iomem_is_exclusive(u64 addr);
 
+extern int
+walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
+                void *arg, int (*func)(unsigned long, unsigned long, void *));
+
 #endif /* __ASSEMBLY__ */
 #endif  /* _LINUX_IOPORT_H */