nvme_feat_disc_impl
if (!nf->nf_unimpl && nvme_feat_disc_impl(disc) ==
if (nvme_feat_disc_impl(disc) == NVME_FEAT_IMPL_UNKNOWN &&
switch (nvme_feat_disc_impl(feat)) {
nvme_feat_disc_impl(feat));
extern nvme_feat_impl_t nvme_feat_disc_impl(const nvme_feat_disc_t *);