schedchange, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
if(ret) hn--;
ret = lttv_trace_find_hook(ts->parent.t,
LTT_FACILITY_KERNEL, LTT_EVENT_PROCESS_FORK,
schedchange, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
if(ret) hn--;
ret = lttv_trace_find_hook(ts->parent.t,
LTT_FACILITY_KERNEL, LTT_EVENT_PROCESS_FORK,