Merge pull request #12424 from poettering/logind-brightness

logind: add SetBrightness() bus call as minimal API for setting "leds" and "backlight" kernel class device brightness

src/shared/bus-util.c

@@ -1767,3 +1767,13 @@ int bus_reply_pair_array(sd_bus_message *m, char **l) {
 
         return sd_bus_send(NULL, reply, NULL);
 }
+
+static void bus_message_unref_wrapper(void *m) {
+        sd_bus_message_unref(m);
+}
+
+const struct hash_ops bus_message_hash_ops = {
+        .hash = trivial_hash_func,
+        .compare = trivial_compare_func,
+        .free_value = bus_message_unref_wrapper,
+};

src/shared/bus-util.h

@@ -179,3 +179,5 @@ static inline int bus_open_system_watch_bind(sd_bus **ret) {
 }
 
 int bus_reply_pair_array(sd_bus_message *m, char **l);
+
+extern const struct hash_ops bus_message_hash_ops;