Daniel Walker <[email protected]> wrote:
>
> + if (likeliness->type & LIKELY_UNSEEN) {
> + if (atomic_dec_and_test(&likely_lock)) {
> + if (likeliness->type & LIKELY_UNSEEN) {
> + likeliness->type &= (~LIKELY_UNSEEN);
> + likeliness->next = likeliness_head;
> + likeliness_head = likeliness;
> + }
> + }
> + atomic_inc(&likely_lock);
hm, good enough I guess. It does need a comment explaining why we
don't just do spin_lock().
It'd be a bit saner to do
if (!test_and_set_bit(&foo, 0)) {
...
clear_bit(&foo, 0);
}
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