kld_load
int kld_load(const char *_name);
if (!kld_isloaded("g_md") && kld_load("geom_md") == -1)
dtrace_kld_load_tag = EVENTHANDLER_REGISTER(kld_load,
EVENTHANDLER_DEREGISTER(kld_load, dtrace_kld_load_tag);
sdt_kld_load_tag = EVENTHANDLER_REGISTER(kld_load, sdt_kld_load, NULL,
EVENTHANDLER_DEREGISTER(kld_load, sdt_kld_load_tag);
pmc_kld_load_tag = EVENTHANDLER_REGISTER(kld_load, pmc_kld_load,
EVENTHANDLER_DEREGISTER(kld_load, pmc_kld_load_tag);
EVENTHANDLER_INVOKE(kld_load, lf);
EVENTHANDLER_DECLARE(kld_load, kld_load_fn);