static void __ldsem_wake(struct ld_semaphore *sem)
{
	if (!list_empty(&sem->write_wait))
		__ldsem_wake_writer(sem);
	else if (!list_empty(&sem->read_wait))
		__ldsem_wake_readers(sem);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.