static void smp_task_done(struct sas_task *task)
{
	del_timer(&task->slow_task->timer);
	complete(&task->slow_task->completion);
}
The program contains a code sequence that can run concurrently with other code, and the code sequence 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 that is operating concurrently.