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workqueue: factor out __queue_delayed_work() from queue_delayed_work_on() 

This is to prepare for mod_delayed_work[_on]() and doesn't cause any
functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Tejun Heo 2012-08-03 10:30:46 -07:00
parent b549007727
commit 7beb2edf44
1 changed files with 41 additions and 33 deletions
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74
kernel/workqueue.c
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@ -1261,6 +1261,46 @@ void delayed_work_timer_fn(unsigned long __data)
}
EXPORT_SYMBOL_GPL(delayed_work_timer_fn);
static void __queue_delayed_work(int cpu, struct workqueue_struct *wq,
struct delayed_work *dwork, unsigned long delay)
{
struct timer_list *timer = &dwork->timer;
struct work_struct *work = &dwork->work;
unsigned int lcpu;
WARN_ON_ONCE(timer->function != delayed_work_timer_fn ||
timer->data != (unsigned long)dwork);
BUG_ON(timer_pending(timer));
BUG_ON(!list_empty(&work->entry));
timer_stats_timer_set_start_info(&dwork->timer);
/*
* This stores cwq for the moment, for the timer_fn. Note that the
* work's gcwq is preserved to allow reentrance detection for
* delayed works.
*/
if (!(wq->flags & WQ_UNBOUND)) {
struct global_cwq *gcwq = get_work_gcwq(work);
if (gcwq && gcwq->cpu != WORK_CPU_UNBOUND)
lcpu = gcwq->cpu;
else
lcpu = raw_smp_processor_id();
} else {
lcpu = WORK_CPU_UNBOUND;
}
set_work_cwq(work, get_cwq(lcpu, wq), 0);
timer->expires = jiffies + delay;
if (unlikely(cpu != WORK_CPU_UNBOUND))
add_timer_on(timer, cpu);
else
add_timer(timer);
}
/**
* queue_delayed_work_on - queue work on specific CPU after delay
* @cpu: CPU number to execute work on
@ -1275,7 +1315,6 @@ EXPORT_SYMBOL_GPL(delayed_work_timer_fn);
bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
struct delayed_work *dwork, unsigned long delay)
{
struct timer_list *timer = &dwork->timer;
struct work_struct *work = &dwork->work;
bool ret = false;
unsigned long flags;
@ -1287,38 +1326,7 @@ bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
local_irq_save(flags);
if (!test_and_set_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work))) {
unsigned int lcpu;
WARN_ON_ONCE(timer->function != delayed_work_timer_fn ||
timer->data != (unsigned long)dwork);
BUG_ON(timer_pending(timer));
BUG_ON(!list_empty(&work->entry));
timer_stats_timer_set_start_info(&dwork->timer);
/*
* This stores cwq for the moment, for the timer_fn.
* Note that the work's gcwq is preserved to allow
* reentrance detection for delayed works.
*/
if (!(wq->flags & WQ_UNBOUND)) {
struct global_cwq *gcwq = get_work_gcwq(work);
if (gcwq && gcwq->cpu != WORK_CPU_UNBOUND)
lcpu = gcwq->cpu;
else
lcpu = raw_smp_processor_id();
} else
lcpu = WORK_CPU_UNBOUND;
set_work_cwq(work, get_cwq(lcpu, wq), 0);
timer->expires = jiffies + delay;
if (unlikely(cpu != WORK_CPU_UNBOUND))
add_timer_on(timer, cpu);
else
add_timer(timer);
__queue_delayed_work(cpu, wq, dwork, delay);
ret = true;
}