PspLockProcessExclusive

void __fastcall PspLockProcessExclusive(__int64 a1, __int64 a2){
  --*(_WORD *)(a2 + 484);
  ExAcquirePushLockExclusiveEx(a1 + 1080, 0i64);
}

Referenced by:

NtSetInformationProcess
NtTerminateProcess
PspAllocateProcess
PspCreatePicoProcess