diff --git a/fs/mount.h b/fs/mount.h
index 853738f..452ae41 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -1,10 +1,22 @@
 #include <linux/mount.h>
 
+struct mnt_pcp {
+	int mnt_count;
+	int mnt_writers;
+};
+
 struct mount {
 	struct list_head mnt_hash;
 	struct mount *mnt_parent;
 	struct dentry *mnt_mountpoint;
 	struct vfsmount mnt;
+#ifdef CONFIG_SMP
+	struct mnt_pcp __percpu *mnt_pcp;
+	atomic_t mnt_longterm;		/* how many of the refs are longterm */
+#else
+	int mnt_count;
+	int mnt_writers;
+#endif
 };
 
 static inline struct mount *real_mount(struct vfsmount *mnt)