XEN_LAZY_NONE
BUG_ON(this_cpu_read(xen_lazy_mode) != XEN_LAZY_NONE);
this_cpu_write(xen_lazy_mode, XEN_LAZY_NONE);
DEFINE_PER_CPU(enum xen_lazy_mode, xen_lazy_mode) = XEN_LAZY_NONE;
return XEN_LAZY_NONE;