diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 29cb861ae4495d82008b131907bbe22f3782114f..83cb9f013fe094ade1c74811f1ffa3a89e903052 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -352,7 +352,9 @@ static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dent
 	*p++ = htonl(attrs);                           /* bitmap */
 	*p++ = htonl(12);             /* attribute buffer length */
 	*p++ = htonl(NF4DIR);
+	spin_lock(&dentry->d_lock);
 	p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
+	spin_unlock(&dentry->d_lock);
 
 	readdir->pgbase = (char *)p - (char *)start;
 	readdir->count -= readdir->pgbase;