ptrace: __ptrace_unlink: use the ptrace_reparented() helper

[safe/jmp/linux-2.6] / kernel / workqueue.c

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 00ff4d0..7db251a 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -158,8 +158,8 @@ static void __queue_work(struct cpu_workqueue_struct *cwq,
  *
  * Returns 0 if @work was already on a queue, non-zero otherwise.
  *
- * We queue the work to the CPU it was submitted, but there is no
- * guarantee that it will be processed by that CPU.
+ * We queue the work to the CPU on which it was submitted, but if the CPU dies
+ * it can be processed by another CPU.
  */
 int queue_work(struct workqueue_struct *wq, struct work_struct *work)
 {
@@ -772,7 +772,7 @@ struct workqueue_struct *__create_workqueue_key(const char *name,
 }
 EXPORT_SYMBOL_GPL(__create_workqueue_key);
 
-static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
+static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
 {
        /*
         * Our caller is either destroy_workqueue() or CPU_DEAD,
@@ -808,19 +808,16 @@ static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
 void destroy_workqueue(struct workqueue_struct *wq)
 {
        const cpumask_t *cpu_map = wq_cpu_map(wq);
-       struct cpu_workqueue_struct *cwq;
        int cpu;
 
        get_online_cpus();
        spin_lock(&workqueue_lock);
        list_del(&wq->list);
        spin_unlock(&workqueue_lock);
-       put_online_cpus();
 
-       for_each_cpu_mask(cpu, *cpu_map) {
-               cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-               cleanup_workqueue_thread(cwq, cpu);
-       }
+       for_each_cpu_mask(cpu, *cpu_map)
+               cleanup_workqueue_thread(per_cpu_ptr(wq->cpu_wq, cpu));
+       put_online_cpus();
 
        free_percpu(wq->cpu_wq);
        kfree(wq);
@@ -838,7 +835,6 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
        action &= ~CPU_TASKS_FROZEN;
 
        switch (action) {
-
        case CPU_UP_PREPARE:
                cpu_set(cpu, cpu_populated_map);
        }
@@ -861,11 +857,17 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
                case CPU_UP_CANCELED:
                        start_workqueue_thread(cwq, -1);
                case CPU_DEAD:
-                       cleanup_workqueue_thread(cwq, cpu);
+                       cleanup_workqueue_thread(cwq);
                        break;
                }
        }
 
+       switch (action) {
+       case CPU_UP_CANCELED:
+       case CPU_DEAD:
+               cpu_clear(cpu, cpu_populated_map);
+       }
+
        return NOTIFY_OK;
 }