static bool rb_time_cmpxchg(rb_time_t *t, u64 expect, u64 set)
{
	u64 val;
	val = local64_cmpxchg(&t->time, expect, set);
	return val == expect;
}
static bool rb_time_cmpxchg(rb_time_t *t, u64 expect, u64 set)
{
	u64 val;
	val = local64_cmpxchg(&t->time, expect, set);
	return val == expect;
}