PspLockProcessSecurityShared

VOID __stdcall PspLockProcessSecurityShared(PEPROCESS Process, PETHREAD CurrentThread){
  --CurrentThread->Tcb.KernelApcDisable;
  ExAcquirePushLockSharedEx(&Process->ProcessLock, 0i64);
}

Referenced by:

NtQueryInformationProcess
NtSetInformationThread
PspAssignPrimaryToken