iokit/Kernel/IOHibernateIO.cpp

646 	vars->fileRef = kern_open_file_for_direct_io(filename,
667 	if (!vars->fileRef) err = kIOReturnNoSpace;
828 	if (vars->fileRef)
830 	    kern_close_file_for_direct_io(vars->fileRef, 0, 0, 0, 0, 0);
831 	    vars->fileRef = NULL;
1510 	gIOHibernateFileRef = gFileVars.fileRef;
1517 	if (vars->fileVars && vars->fileVars->fileRef) kern_close_file_for_direct_io(vars->fileVars->fileRef, 0, 0, 0, 0, 0);
1924     struct kern_direct_file_io_ref_t * fileRef;
1930 	if ((fileRef = gIOHibernateFileRef))
1933 	    kern_close_file_for_direct_io(fileRef,