patch-ids: replace the seen indicator with a commit pointer

The cherry_pick_list was looping through the original side checking the
seen indicator and setting the cherry_flag on the commit.  If we save
off the commit in the patch_id we can set the cherry_flag on the correct
commit when running through the other side when a patch_id match is found.

Signed-off-by: Kevin Willford <kcwillford@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

patch-ids.c

@@ -43,6 +43,7 @@ static int init_patch_id_entry(struct patch_id *patch,
 			       struct commit *commit,
 			       struct patch_ids *ids)
 {
+	patch->commit = commit;
 	if (commit_patch_id(commit, &ids->diffopts, patch->patch_id))
 		return -1;
 

patch-ids.h

@@ -4,7 +4,7 @@
 struct patch_id {
 	struct hashmap_entry ent;
 	unsigned char patch_id[GIT_SHA1_RAWSZ];
-	char seen;
+	struct commit *commit;
 };
 
 struct patch_ids {

revision.c

@@ -846,7 +846,7 @@ static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
 		 */
 		if (left_first != !!(flags & SYMMETRIC_LEFT))
 			continue;
-		commit->util = add_commit_patch_id(commit, &ids);
+		add_commit_patch_id(commit, &ids);
 	}
 
 	/* either cherry_mark or cherry_pick are true */
@@ -873,21 +873,9 @@ static void cherry_pick_list(struct commit_list *list, struct rev_info *revs)
 		id = has_commit_patch_id(commit, &ids);
 		if (!id)
 			continue;
-		id->seen = 1;
+
 		commit->object.flags |= cherry_flag;
-	}
-
-	/* Now check the original side for seen ones */
-	for (p = list; p; p = p->next) {
-		struct commit *commit = p->item;
-		struct patch_id *ent;
-
-		ent = commit->util;
-		if (!ent)
-			continue;
-		if (ent->seen)
-			commit->object.flags |= cherry_flag;
-		commit->util = NULL;
+		id->commit->object.flags |= cherry_flag;
 	}
 
 	free_patch_ids(&ids);