gmap_protect_rmap
rc = gmap_protect_rmap(mc, sg, entries[i].gfn, gpa_to_gfn(saddr),
rc = gmap_protect_rmap(mc, sg, context->f[i].gfn, 0, context->f[i].pfn,
int gmap_protect_rmap(struct kvm_s390_mmu_cache *mc, struct gmap *sg, gfn_t p_gfn, gfn_t r_gfn,