hashmap: introduce hash_ops to make struct Hashmap smaller

It is redundant to store 'hash' and 'compare' function pointers in
struct Hashmap separately. The functions always comprise a pair.
Store a single pointer to struct hash_ops instead.

systemd keeps hundreds of hashmaps, so this saves a little bit of
memory.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/network/networkd-network.c b/src/network/networkd-network.c
index a2e27e0910..aad99236c4 100644
--- a/src/network/networkd-network.c
+++ b/src/network/networkd-network.c
@@ -63,15 +63,15 @@ static int network_load_one(Manager *manager, const char *filename) {
         LIST_HEAD_INIT(network->static_addresses);
         LIST_HEAD_INIT(network->static_routes);
 
-        network->stacked_netdevs = hashmap_new(string_hash_func, string_compare_func);
+        network->stacked_netdevs = hashmap_new(&string_hash_ops);
         if (!network->stacked_netdevs)
                 return log_oom();
 
-        network->addresses_by_section = hashmap_new(NULL, NULL);
+        network->addresses_by_section = hashmap_new(NULL);
         if (!network->addresses_by_section)
                 return log_oom();
 
-        network->routes_by_section = hashmap_new(NULL, NULL);
+        network->routes_by_section = hashmap_new(NULL);
         if (!network->routes_by_section)
                 return log_oom();