child1
child1();
pthread_t child1, child2, child3, child4;
CHECKr(pthread_create(&child1, NULL, child1fn, NULL));
CHECKr(pthread_cancel(child1));
CHECKr(pthread_join(child1, NULL));
CHECKr(pthread_atfork(prepare1, parent1, child1));
struct efp_child_device_config child1;
v->child1.handle = DEVICE_TYPE_EFP2;
v->child1.device_type = DEVICE_TYPE_DP;
v->child1.dvo_port = DVO_PORT_DPB;
v->child1.aux_channel = DP_AUX_B;
v->child1.dp_compat = true;
v->child1.integrated_encoder = true;