-int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m);
-int bus_kernel_read_message(sd_bus *bus);
+int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call);
+int bus_kernel_read_message(sd_bus *bus, bool hint_priority, int64_t priority);