Cleanup. A number of per_cpu_ptr(wq->cpu_wq, cpu) users have to check that cpu
is valid for this wq. Make a simple helper.
Signed-off-by: Oleg Nesterov <[email protected]>
--- 6.20-rc6-mm3/kernel/workqueue.c~8_cpu_helper 2007-02-16 23:27:06.000000000 +0300
+++ 6.20-rc6-mm3/kernel/workqueue.c 2007-02-17 00:31:18.000000000 +0300
@@ -86,6 +86,14 @@ static const cpumask_t *wq_cpu_map(struc
? &cpu_singlethread_map : &cpu_populated_map;
}
+static
+struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu)
+{
+ if (unlikely(is_single_threaded(wq)))
+ cpu = singlethread_cpu;
+ return per_cpu_ptr(wq->cpu_wq, cpu);
+}
+
/*
* Set the workqueue on which a work item is to be run
* - Must *only* be called if the pending flag is set
@@ -142,16 +150,14 @@ static void __queue_work(struct cpu_work
*/
int fastcall queue_work(struct workqueue_struct *wq, struct work_struct *work)
{
- int ret = 0, cpu = get_cpu();
+ int ret = 0;
if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
- if (unlikely(is_single_threaded(wq)))
- cpu = singlethread_cpu;
BUG_ON(!list_empty(&work->entry));
- __queue_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
+ __queue_work(wq_per_cpu(wq, get_cpu()), work);
+ put_cpu();
ret = 1;
}
- put_cpu();
return ret;
}
EXPORT_SYMBOL_GPL(queue_work);
@@ -161,12 +167,8 @@ void delayed_work_timer_fn(unsigned long
struct delayed_work *dwork = (struct delayed_work *)__data;
struct cpu_workqueue_struct *cwq = get_wq_data(&dwork->work);
struct workqueue_struct *wq = cwq->wq;
- int cpu = smp_processor_id();
-
- if (unlikely(is_single_threaded(wq)))
- cpu = singlethread_cpu;
- __queue_work(per_cpu_ptr(wq->cpu_wq, cpu), &dwork->work);
+ __queue_work(wq_per_cpu(wq, smp_processor_id()), &dwork->work);
}
/**
@@ -209,9 +211,7 @@ int queue_delayed_work_on(int cpu, struc
BUG_ON(!list_empty(&work->entry));
/* This stores cwq for the moment, for the timer_fn */
- set_wq_data(work,
- per_cpu_ptr(wq->cpu_wq, wq->singlethread ?
- singlethread_cpu : raw_smp_processor_id()));
+ set_wq_data(work, wq_per_cpu(wq, raw_smp_processor_id()));
timer->expires = jiffies + delay;
timer->data = (unsigned long)dwork;
timer->function = delayed_work_timer_fn;
-
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