Hi Bart
On 07/26/2018 06:26 AM, Bart Van Assche wrote:
> +
> +void blk_pm_runtime_lock(struct request_queue *q)
> +{
> + spin_lock(&q->rpm_lock);
> + wait_event_interruptible_locked(q->rpm_wq,
> + q->rpm_owner == NULL || q->rpm_owner == current);
> + if (q->rpm_owner == NULL)
> + q->rpm_owner = current;
> + q->rpm_nesting_level++;
> + spin_unlock(&q->rpm_lock);
> +}
The lock which wait_event_interruptible_locked want to hold is the wq.lock.
Please refer to comment of wait_event_interruptible_locked
* It must be called with wq.lock being held. This spinlock is
* unlocked while sleeping but @condition testing is done while lock
* is held and when this macro exits the lock is held.
Thanks
Jianchao
