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| author | Tejun Heo | 2013-03-13 01:41:37 +0100 |
|---|---|---|
| committer | Tejun Heo | 2013-03-13 01:42:01 +0100 |
| commit | e62676169118bc2d42e5008b3f8872646313f077 (patch) | |
| tree | 98ce7e6b03a8a18fa322de7997248a8e0b7b2f84 /kernel/workqueue.c | |
| parent | workqueue: implement sysfs interface for workqueues (diff) | |
| download | kernel-qcow2-linux-e62676169118bc2d42e5008b3f8872646313f077.tar.gz kernel-qcow2-linux-e62676169118bc2d42e5008b3f8872646313f077.tar.xz kernel-qcow2-linux-e62676169118bc2d42e5008b3f8872646313f077.zip | |
workqueue: implement current_is_workqueue_rescuer()
Implement a function which queries whether it currently is running off
a workqueue rescuer. This will be used to convert writeback to
workqueue.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/workqueue.c')
| -rw-r--r-- | kernel/workqueue.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index c82feac0a878..f5c8bbb9ada3 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -4072,6 +4072,19 @@ void workqueue_set_max_active(struct workqueue_struct *wq, int max_active) EXPORT_SYMBOL_GPL(workqueue_set_max_active); /** + * current_is_workqueue_rescuer - is %current workqueue rescuer? + * + * Determine whether %current is a workqueue rescuer. Can be used from + * work functions to determine whether it's being run off the rescuer task. + */ +bool current_is_workqueue_rescuer(void) +{ + struct worker *worker = current_wq_worker(); + + return worker && worker == worker->current_pwq->wq->rescuer; +} + +/** * workqueue_congested - test whether a workqueue is congested * @cpu: CPU in question * @wq: target workqueue |