write_ldt_entry
PVOP_VCALL3(pv_ops, cpu.write_ldt_entry, dt, entry, desc);
void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum,
.cpu.write_ldt_entry = native_write_ldt_entry,
pv_ops.cpu.write_ldt_entry = xen_write_ldt_entry;