PsGetCurrentProcess

_KPROCESS *__fastcall PsGetCurrentProcess(){
  return &KeGetCurrentThread()->ApcState.Process->Pcb;
}

Referenced by:

CmFcpInitializeChangeSubscription
ExpQuerySystemInformation
KiLockExtendedServiceTable
MiGetPageProtection
MiInitSystem
MiInitializeMdlBatchPages
MmLoadSystemImageEx
NtLockFile
NtQueryInformationProcess
NtSetInformationProcess
NtSetSystemInformation
PopTransitionSystemPowerStateEx
SepCopyAnonymousTokenAndSetSilo
SepFilterToken