KiFlushAffinity

NTSTATUS __stdcall KiFlushAffinity(INT64 a1){
  void *retaddr; 

  if( (_DWORD)a1 )
    return 0;
  _InterlockedOr((volatile signed __int32 *)&retaddr, 0);
  return(NTSTATUS)&KeGetCurrentThread()->ApcState.Process->Pcb.ActiveProcessors;
}

Referenced by:

KeFlushMultipleRangeTb
KeFlushTb