1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index 83aa81297ea3..11ef7952b63a 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -188,5 +188,7 @@ extern int
 walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
                 void *arg, int (*func)(unsigned long, unsigned long, void *));
 
+extern int page_is_ram(unsigned long pfn);
+
 #endif /* __ASSEMBLY__ */
 #endif  /* _LINUX_IOPORT_H */