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, 1 insertions, 1 deletions

diff --git a/src/locale/localectl.c b/src/locale/localectl.c
index 2bb0d3b6be..bf8b7b2bef 100644
--- a/src/locale/localectl.c
+++ b/src/locale/localectl.c
@@ -272,7 +272,7 @@ static int list_vconsole_keymaps(sd_bus *bus, char **args, unsigned n) {
         _cleanup_strv_free_ char **l = NULL;
         const char *dir;
 
-        keymaps = set_new(string_hash_func, string_compare_func);
+        keymaps = set_new(&string_hash_ops);
         if (!keymaps)
                 return log_oom();