- same_tree_as_empty(p->tree)) {
- /* We are adding all the specified paths from
- * this parent, so the parents of it is
- * not interesting, but the difference between
- * this parent and us still is interesting.
+ rev_same_tree_as_empty(p->tree)) {
+ /* We are adding all the specified
+ * paths from this parent, so the
+ * history beyond this parent is not
+ * interesting. Remove its parents
+ * (they are grandparents for us).
+ * IOW, we pretend this parent is a
+ * "root" commit.