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workqueue: Factor out pwq_is_empty() 

[ Upstream commit afa87ce85379e2d93863fce595afdb5771a84004 ]

"!pwq->nr_active && list_empty(&pwq->inactive_works)" test is repeated
multiple times. Let's factor it out into pwq_is_empty().

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Stable-dep-of: 5797b1c18919 ("workqueue: Implement system-wide nr_active enforcement for unbound workqueues")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tejun Heo 2024-01-29 08:11:24 -10:00 committed by Sasha Levin
parent 82e098f5be
commit bad184d26a
1 changed files with 9 additions and 4 deletions
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13
kernel/workqueue.c
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@ -1450,6 +1450,11 @@ static void put_pwq_unlocked(struct pool_workqueue *pwq)
}
}
static bool pwq_is_empty(struct pool_workqueue *pwq)
{
return !pwq->nr_active && list_empty(&pwq->inactive_works);
}
static void pwq_activate_inactive_work(struct work_struct *work)
{
struct pool_workqueue *pwq = get_work_pwq(work);
@ -3319,7 +3324,7 @@ reflush:
bool drained;
raw_spin_lock_irq(&pwq->pool->lock);
drained = !pwq->nr_active && list_empty(&pwq->inactive_works);
drained = pwq_is_empty(pwq);
raw_spin_unlock_irq(&pwq->pool->lock);
if (drained)
@ -4779,7 +4784,7 @@ static bool pwq_busy(struct pool_workqueue *pwq)
if ((pwq != pwq->wq->dfl_pwq) && (pwq->refcnt > 1))
return true;
if (pwq->nr_active || !list_empty(&pwq->inactive_works))
if (!pwq_is_empty(pwq))
return true;
return false;
@ -5217,7 +5222,7 @@ void show_one_workqueue(struct workqueue_struct *wq)
unsigned long flags;
for_each_pwq(pwq, wq) {
if (pwq->nr_active || !list_empty(&pwq->inactive_works)) {
if (!pwq_is_empty(pwq)) {
idle = false;
break;
}
@ -5229,7 +5234,7 @@ void show_one_workqueue(struct workqueue_struct *wq)
for_each_pwq(pwq, wq) {
raw_spin_lock_irqsave(&pwq->pool->lock, flags);
if (pwq->nr_active || !list_empty(&pwq->inactive_works)) {
if (!pwq_is_empty(pwq)) {
/*
* Defer printing to avoid deadlocks in console
* drivers that queue work while holding locks