1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index f75548b8ed7a..fad8b986800f 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -11,6 +11,7 @@
 #include <linux/err.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
+#include <linux/idr.h>
 #include <linux/lockdep.h>
 
 struct file;
@@ -23,6 +24,9 @@ struct sysfs_dirent;
 struct kernfs_root {
         /* published fields */
         struct sysfs_dirent     *sd;
+
+        /* private fields, do not use outside kernfs proper */
+        struct ida              ino_ida;
 };
 
 struct sysfs_open_file {