NFS: define a function to update nfsi->cache_change_attribute

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 826b445..26192a7 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -210,7 +210,7 @@
 	spin_lock(&dir->i_lock);
 	nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
 	if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
-		nfsi->cache_change_attribute = jiffies;
+		nfs_force_lookup_revalidate(dir);
 	nfsi->change_attr = cinfo->after;
 	spin_unlock(&dir->i_lock);
 }