GDT_SIZE
.size = GDT_SIZE - 1,
gdt_descr.size = GDT_SIZE - 1;
gdt_descr.size = GDT_SIZE - 1;
GDT_SIZE))
gdt_descr.size = GDT_SIZE - 1;
ctxt->gdt_desc.size = GDT_SIZE - 1;