SYSDATA_TASKNAME
curr = !!(nt->sysdata_fields & SYSDATA_TASKNAME);
nt->sysdata_fields |= SYSDATA_TASKNAME;
disable_sysdata_feature(nt, SYSDATA_TASKNAME);
if (nt->sysdata_fields & SYSDATA_TASKNAME)
taskname_enabled = !!(nt->sysdata_fields & SYSDATA_TASKNAME);