switch ->put_link() from dentry to inode

only one instance looks at that argument at all; that sole
exception wants inode rather than dentry.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 9986833..308379b 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -174,7 +174,7 @@
 	return ret;
 }
 
-static void ovl_put_link(struct dentry *dentry, void *c)
+static void ovl_put_link(struct inode *unused, void *c)
 {
 	struct inode *realinode;
 	struct ovl_link_data *data = c;
@@ -183,7 +183,7 @@
 		return;
 
 	realinode = data->realdentry->d_inode;
-	realinode->i_op->put_link(data->realdentry, data->cookie);
+	realinode->i_op->put_link(realinode, data->cookie);
 	kfree(data);
 }