nvmet_ns_changed
nvmet_ns_changed(subsys, req->ns->nsid);
nvmet_ns_changed(req->ns->subsys, req->ns->nsid);
nvmet_ns_changed(ns->subsys, ns->nsid);
nvmet_ns_changed(subsys, ns->nsid);
nvmet_ns_changed(subsys, ns->nsid);
void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid);
nvmet_ns_changed(req->ns->subsys, req->ns->nsid);