diff --git a/fs/namespace.c b/fs/namespace.c
index 691cd7c832758eb732e8ac8e5095c761c5cdf960..cd7dbabf0c6c6f0d3cfd93fa321d510cda6b9db6 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -63,8 +63,6 @@ static inline unsigned long hash(struct vfsmount *mnt, struct dentry *dentry)
 	return tmp & (HASH_SIZE - 1);
 }
 
-#define MNT_WRITER_UNDERFLOW_LIMIT -(1<<16)
-
 /*
  * allocation is serialized by namespace_sem, but we need the spinlock to
  * serialize with freeing.