nvme_genctr_mask
#define nvme_cid_install_genctr(gen) (nvme_genctr_mask(gen) << 12)
if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));