1 files changed, 20 insertions, 3 deletions

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index ccefe574dcf7..12328147132c 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -647,7 +647,7 @@ EXPORT_SYMBOL(schedule_delayed_work);
  */
 void flush_delayed_work(struct delayed_work *dwork)
 {
-        if (del_timer(&dwork->timer)) {
+        if (del_timer_sync(&dwork->timer)) {
                 struct cpu_workqueue_struct *cwq;
                 cwq = wq_per_cpu(keventd_wq, get_cpu());
                 __queue_work(cwq, &dwork->work);
@@ -685,21 +685,38 @@ EXPORT_SYMBOL(schedule_delayed_work_on);
 int schedule_on_each_cpu(work_func_t func)
 {
         int cpu;
+        int orig = -1;
         struct work_struct *works;
 
         works = alloc_percpu(struct work_struct);
         if (!works)
                 return -ENOMEM;
 
+        /*
+         * when running in keventd don't schedule a work item on itself.
+         * Can just call directly because the work queue is already bound.
+         * This also is faster.
+         * Make this a generic parameter for other workqueues?
+         */
+        if (current_is_keventd()) {
+                orig = raw_smp_processor_id();
+                INIT_WORK(per_cpu_ptr(works, orig), func);
+                func(per_cpu_ptr(works, orig));
+        }
+
         get_online_cpus();
         for_each_online_cpu(cpu) {
                 struct work_struct *work = per_cpu_ptr(works, cpu);
 
+                if (cpu == orig)
+                        continue;
                 INIT_WORK(work, func);
                 schedule_work_on(cpu, work);
         }
-        for_each_online_cpu(cpu)
-                flush_work(per_cpu_ptr(works, cpu));
+        for_each_online_cpu(cpu) {
+                if (cpu != orig)
+                        flush_work(per_cpu_ptr(works, cpu));
+        }
         put_online_cpus();
         free_percpu(works);
         return 0;