ClabureDB: Classified Bug-Reports Database

         plist_for_each_entry_safe(this, next, head1, list) {
                 if (!match_futex (&this->key, &key1))
                         continue;
                 if (++ret <= nr_wake) {
                         wake_futex(this);
                 } else {
                         /*
                          * If key1 and key2 hash to the same bucket, no need to
                          * requeue.
                          */
                         if (likely(head1 != &hb2->chain)) {
                                 plist_del(&this->list, &hb1->chain);
                                 plist_add(&this->list, &hb2->chain);
                                 this->lock_ptr = &hb2->lock;
 #ifdef CONFIG_DEBUG_PI_LIST
                                 this->list.plist.lock = &hb2->lock;
 #endif
                         }
                         this->key = key2;
                         get_futex_key_refs(&key2);
                         drop_count++;
 
                         if (ret - nr_wake >= nr_requeue)
                                 break;
                 }
         }
 
 out_unlock:
         spin_unlock(&hb1->lock);
         if (hb1 != hb2)
                 spin_unlock(&hb2->lock);
 
         /* drop_futex_key_refs() must be called outside the spinlocks. */
         while (--drop_count >= 0)
                 drop_futex_key_refs(&key1);
 
 out:
         futex_unlock_mm(fshared);
         return ret;
 }