[PATCH 2/8] Add interface for queuing work on a specific CPU

Jens Axboe
2008-02-07T09:20:48Z

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
---
include/linux/workqueue.h | 1 +
kernel/workqueue.c | 15 +++++++++++++++
2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 7f28c32..4c46944 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -179,6 +179,7 @@ __create_workqueue_key(const char *name, int singlethread,
extern void destroy_workqueue(struct workqueue_struct *wq);

extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
+extern int FASTCALL(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 delayed_work *work, unsigned long delay));
extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 52db48e..551ad7e 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -175,6 +175,21 @@ int fastcall queue_work(struct workqueue_struct *wq, struct work_struct *work)
}
EXPORT_SYMBOL_GPL(queue_work);

+int fastcall queue_work_on_cpu(struct workqueue_struct *wq,
+ struct work_struct *work, int cpu)
+{
+ int ret = 0;
+
+ if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
+ BUG_ON(!list_empty(&work->entry));
+ __queue_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
+ ret = 1;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(queue_work_on_cpu);
+
void delayed_work_timer_fn(unsigned long __data)
{
struct delayed_work *dwork = (struct delayed_work *)__data;
--
1.5.4.22.g7a20