1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 14376ebf4bac..416d4e4ce94e 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -23,6 +23,9 @@ struct pid_namespace {
         struct kmem_cache *pid_cachep;
         int level;
         struct pid_namespace *parent;
+#ifdef CONFIG_PROC_FS
+        struct vfsmount *proc_mnt;
+#endif
 };
 
 extern struct pid_namespace init_pid_ns;