preempt_lazy?

preempt_lazy?

You need to hold a lock to walk the list, so it would be cond_resched_lock() except that if you drop the lock you might lose your place so it really becomes

If (need_resched()) {
       insert_dcache_cursor();
       spin_unlock();
       cond_resched();
       spin_lock();
       remove_cursor();
}