The block layer needs the ability to queue unplug work so that it will
execute on a CPU other than the current one.


---

 include/linux/workqueue.h |    4 +++-
 kernel/workqueue.c        |   16 +++++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff -puN kernel/workqueue.c~queue_work_on_cpu kernel/workqueue.c
--- 25/kernel/workqueue.c~queue_work_on_cpu	2004-03-02 03:52:16.000000000 -0800
+++ 25-akpm/kernel/workqueue.c	2004-03-02 03:56:29.000000000 -0800
@@ -94,18 +94,29 @@ static void __queue_work(struct cpu_work
  * We queue the work to the CPU it was submitted, but there is no
  * guarantee that it will be processed by that CPU.
  */
-int fastcall queue_work(struct workqueue_struct *wq, struct work_struct *work)
+int queue_work_on_cpu(struct workqueue_struct *wq,
+			struct work_struct *work, int cpu)
 {
-	int ret = 0, cpu = get_cpu();
+	int ret = 0;
 
 	if (!test_and_set_bit(0, &work->pending)) {
 		BUG_ON(!list_empty(&work->entry));
 		__queue_work(wq->cpu_wq + cpu, work);
 		ret = 1;
 	}
+	return ret;
+}
+EXPORT_SYMBOL_GPL(queue_work);
+
+int queue_work(struct workqueue_struct *wq, struct work_struct *work)
+{
+	int ret;
+
+	ret = queue_work_on_cpu(wq, work, get_cpu());
 	put_cpu();
 	return ret;
 }
+EXPORT_SYMBOL_GPL(queue_work_on_cpu);
 
 static void delayed_work_timer_fn(unsigned long __data)
 {
@@ -449,7 +460,6 @@ void init_workqueues(void)
 }
 
 EXPORT_SYMBOL_GPL(create_workqueue);
-EXPORT_SYMBOL_GPL(queue_work);
 EXPORT_SYMBOL_GPL(queue_delayed_work);
 EXPORT_SYMBOL_GPL(flush_workqueue);
 EXPORT_SYMBOL_GPL(destroy_workqueue);
diff -puN include/linux/workqueue.h~queue_work_on_cpu include/linux/workqueue.h
--- 25/include/linux/workqueue.h~queue_work_on_cpu	2004-03-02 03:52:16.000000000 -0800
+++ 25-akpm/include/linux/workqueue.h	2004-03-02 03:55:33.000000000 -0800
@@ -52,7 +52,9 @@ struct work_struct {
 extern struct workqueue_struct *create_workqueue(const char *name);
 extern void destroy_workqueue(struct workqueue_struct *wq);
 
-extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
+int queue_work(struct workqueue_struct *wq, struct work_struct *work);
+int queue_work_on_cpu(struct workqueue_struct *wq,
+			struct work_struct *work, int cpu);
 extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct work_struct *work, unsigned long delay));
 extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
 

_