From: Oleg Nesterov Change queue_delayed_work() to use queue_delayed_work_on() to avoid the code duplication (saves 133 bytes). Q: queue_delayed_work() enqueues &dwork->work directly when delay == 0, why? [jirislaby@gmail.com: oops fix] Signed-off-by: Oleg Nesterov Signed-off-by: Jiri Slaby Signed-off-by: Andrew Morton --- kernel/workqueue.c | 32 ++++++++++---------------------- 1 files changed, 10 insertions(+), 22 deletions(-) diff -puN kernel/workqueue.c~unify-queue_delayed_work-and-queue_delayed_work_on kernel/workqueue.c --- a/kernel/workqueue.c~unify-queue_delayed_work-and-queue_delayed_work_on +++ a/kernel/workqueue.c @@ -180,28 +180,11 @@ void delayed_work_timer_fn(unsigned long int fastcall queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *dwork, unsigned long delay) { - int ret = 0; - struct timer_list *timer = &dwork->timer; - struct work_struct *work = &dwork->work; - - timer_stats_timer_set_start_info(timer); + timer_stats_timer_set_start_info(&dwork->timer); if (delay == 0) - return queue_work(wq, work); - - if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) { - BUG_ON(timer_pending(timer)); - BUG_ON(!list_empty(&work->entry)); + return queue_work(wq, &dwork->work); - /* This stores cwq for the moment, for the timer_fn */ - set_wq_data(work, - per_cpu_ptr(wq->cpu_wq, raw_smp_processor_id())); - timer->expires = jiffies + delay; - timer->data = (unsigned long)dwork; - timer->function = delayed_work_timer_fn; - add_timer(timer); - ret = 1; - } - return ret; + return queue_delayed_work_on(-1, wq, dwork, delay); } EXPORT_SYMBOL_GPL(queue_delayed_work); @@ -227,11 +210,16 @@ int queue_delayed_work_on(int cpu, struc /* This stores cwq for the moment, for the timer_fn */ set_wq_data(work, - per_cpu_ptr(wq->cpu_wq, raw_smp_processor_id())); + per_cpu_ptr(wq->cpu_wq, wq->singlethread ? + singlethread_cpu : raw_smp_processor_id())); timer->expires = jiffies + delay; timer->data = (unsigned long)dwork; timer->function = delayed_work_timer_fn; - add_timer_on(timer, cpu); + + if (unlikely(cpu >= 0)) + add_timer_on(timer, cpu); + else + add_timer(timer); ret = 1; } return ret; _