dupreq_lock
mutex_t dupreq_lock = MUTEX_INITIALIZER;
extern mutex_t dupreq_lock;
mutex_lock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_lock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_lock(&dupreq_lock);
mutex_unlock(&dupreq_lock);
mutex_unlock(&dupreq_lock);