static bool mask[32];
-static int filter(sd_bus *b, sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+static int filter(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
log_info("Ran %u", PTR_TO_UINT(userdata));
assert_se(PTR_TO_UINT(userdata) < ELEMENTSOF(mask));
mask[PTR_TO_UINT(userdata)] = true;