diff --git a/fs/dcache.c b/fs/dcache.c
index 71b6056..849c1c1 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1322,8 +1322,11 @@
 	}
 	spin_lock(&dentry->d_lock);
 	if (!d_unlinked(dentry)) {
-		dentry->d_flags |= DCACHE_MOUNTED;
-		ret = 0;
+		ret = -EBUSY;
+		if (!d_mountpoint(dentry)) {
+			dentry->d_flags |= DCACHE_MOUNTED;
+			ret = 0;
+		}
 	}
  	spin_unlock(&dentry->d_lock);
 out: