Revert "lib : fix duplicate prefix list delete"

This reverts commit 394ed76.

(cherry picked from commit 71fb99d)

lib/plist.c

@@ -336,22 +336,6 @@ prefix_list_entry_lookup(struct prefix_list *plist, struct prefix *prefix,
 	return NULL;
 }
 
-static bool
-prefix_list_entry_lookup_prefix(struct prefix_list *plist,
-				struct prefix_list_entry *plist_entry)
-{
-	struct prefix_list_entry *pentry = NULL;
-
-	for (pentry = plist->head; pentry; pentry = pentry->next) {
-		if (pentry == plist_entry)
-			continue;
-		if (prefix_same(&pentry->prefix, &plist_entry->prefix))
-			return true;
-	}
-
-	return false;
-}
-
 static void trie_walk_affected(size_t validbits, struct pltrie_table *table,
 			       uint8_t byte, struct prefix_list_entry *object,
 			       void (*fn)(struct prefix_list_entry *object,
@@ -420,16 +404,12 @@ static void prefix_list_trie_del(struct prefix_list *plist,
 
 
 void prefix_list_entry_delete(struct prefix_list *plist,
-			      struct prefix_list_entry *pentry, int update_list)
+			      struct prefix_list_entry *pentry,
+			      int update_list)
 {
-	bool duplicate = false;
-
 	if (plist == NULL || pentry == NULL)
 		return;
 
-	if (prefix_list_entry_lookup_prefix(plist, pentry))
-		duplicate = true;
-
 	prefix_list_trie_del(plist, pentry);
 
 	if (pentry->prev)
@@ -441,10 +421,8 @@ void prefix_list_entry_delete(struct prefix_list *plist,
 	else
 		plist->tail = pentry->prev;
 
-	if (!duplicate)
-		route_map_notify_pentry_dependencies(plist->name, pentry,
-						     RMAP_EVENT_PLIST_DELETED);
-
+	route_map_notify_pentry_dependencies(plist->name, pentry,
+					     RMAP_EVENT_PLIST_DELETED);
 	prefix_list_entry_free(pentry);
 
 	plist->count--;
@@ -579,15 +557,11 @@ static void prefix_list_entry_add(struct prefix_list *plist,
 void prefix_list_entry_update_start(struct prefix_list_entry *ple)
 {
 	struct prefix_list *pl = ple->pl;
-	bool duplicate = false;
 
 	/* Not installed, nothing to do. */
 	if (!ple->installed)
 		return;
 
-	if (prefix_list_entry_lookup_prefix(pl, ple))
-		duplicate = true;
-
 	prefix_list_trie_del(pl, ple);
 
 	/* List manipulation: shameless copy from `prefix_list_entry_delete`. */
@@ -600,9 +574,8 @@ void prefix_list_entry_update_start(struct prefix_list_entry *ple)
 	else
 		pl->tail = ple->prev;
 
-	if (!duplicate)
-		route_map_notify_pentry_dependencies(pl->name, ple,
-						     RMAP_EVENT_PLIST_DELETED);
+	route_map_notify_pentry_dependencies(pl->name, ple,
+					     RMAP_EVENT_PLIST_DELETED);
 	pl->count--;
 
 	route_map_notify_dependencies(pl->name, RMAP_EVENT_PLIST_DELETED);