From 8f6aaa7230b8d40c2acadc9c05c384052522af76 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Wed, 27 Nov 2019 20:00:26 +1100
Subject: [PATCH] add comments 'tree_lock(write) must be held'

---
 lib/dns/rbtdb.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index efc5a7c895..e5646f3aaa 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -1728,6 +1728,9 @@ clean_zone_node(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node,
 		node->dirty = 0;
 }
 
+/*
+ * tree_lock(write) must be held.
+ */
 static void
 delete_node(dns_rbtdb_t *rbtdb, dns_rbtnode_t *node) {
 	dns_rbtnode_t *nsecnode;
@@ -2652,6 +2655,8 @@ closeversion(dns_db_t *db, dns_dbversion_t **versionp, bool commit) {
  * E.g. if the wildcard name is "*.sub.example." then we
  * must ensure that "sub.example." exists and is marked as
  * a wildcard level.
+ *
+ * tree_lock(write) must be held.
  */
 static isc_result_t
 add_wildcard_magic(dns_rbtdb_t *rbtdb, const dns_name_t *name) {
@@ -2676,6 +2681,9 @@ add_wildcard_magic(dns_rbtdb_t *rbtdb, const dns_name_t *name) {
 	return (ISC_R_SUCCESS);
 }
 
+/*
+ * tree_lock(write) must be held.
+ */
 static isc_result_t
 add_empty_wildcards(dns_rbtdb_t *rbtdb, const dns_name_t *name) {
 	isc_result_t result;