diff --git a/fs/internal.h b/fs/internal.h
index a6910e9..f6dce46 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -101,3 +101,8 @@
 struct nameidata;
 extern struct file *nameidata_to_filp(struct nameidata *);
 extern void release_open_intent(struct nameidata *);
+
+/*
+ * inode.c
+ */
+extern int invalidate_inodes(struct super_block *);