static void smq_tick(struct dm_cache_policy *p, bool can_block)
{
struct smq_policy *mq = to_smq_policy(p);
unsigned long flags;
spin_lock_irqsave(&mq->lock, flags);
mq->tick++;
update_sentinels(mq);
end_hotspot_period(mq);
end_cache_period(mq);
spin_unlock_irqrestore(&mq->lock, flags);
}
static void copy_tick(struct smq_policy *mq)
{
unsigned long flags, tick;
spin_lock_irqsave(&mq->tick_lock, flags);
tick = mq->tick_protected;
if (tick != mq->tick) {
update_sentinels(mq);
end_hotspot_period(mq);
end_cache_period(mq);
mq->tick = tick;
}
spin_unlock_irqrestore(&mq->tick_lock, flags);
}