iokit/Kernel/IODMACommand.cpp

551 			bytes = poMD->writeBytes(state->fPreparedOffset,
555 			bytes = poMD->readBytes(state->fPreparedOffset,
701 	if ((state->fPreparedOffset != offset)
707 	state->fPreparedOffset = offset;
746 			state->fPreparedLength + ((state->fPreparedOffset + fMDSummary.fPageAlign) & page_mask)));
763 		mapArgs.fOffset = state->fPreparedOffset;
823 	    poMD->performOperation(kIOMemoryIncoherentIOFlush, state->fPreparedOffset, state->fPreparedLength);
838 	*offset = state->fPreparedOffset;
1005     UInt64 offset    = *offsetP + internalState->fPreparedOffset;
1006     UInt64 memLength = internalState->fPreparedOffset + internalState->fPreparedLength;
1011     if ((offset == internalState->fPreparedOffset) || (offset != state->fOffset) || internalState->fNewMD) {
1205 	*offsetP       = offset - internalState->fPreparedOffset;