[JoBullet]

Then only alternative i can think of is looking up in IDA to see raw difference between labels, i.e. (op_sysreq_d - op_const_s) and using that when you want to get op_sysreq_d label(i.e. place op_const_s at some offset where you want op_sysreq_d and increment its value by pointer difference, which should be constant across releases)