MiReturnProcessCommitment

void __fastcall MiReturnProcessCommitment(__int64 a1, __int64 a2){
  _InterlockedExchangeAdd64((volatile signed __int64 *)(a1 + 1608), -a2);
}

Referenced by:

MiAllocateUserPhysicalPages
MiChargeFullProcessCommitment
MmCleanProcessAddressSpace
NtFreeUserPhysicalPages