kthread: implement kthread_data()
Implement kthread_data() which takes @task pointing to a kthread and
returns @data specified when creating the kthread. The caller is
responsible for ensuring the validity of @task when calling this
function.
Signed-off-by: Tejun Heo <tj@kernel.org>
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index f93cb69..685ea65 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -30,6 +30,7 @@
void kthread_bind(struct task_struct *k, unsigned int cpu);
int kthread_stop(struct task_struct *k);
int kthread_should_stop(void);
+void *kthread_data(struct task_struct *k);
int kthreadd(void *unused);
extern struct task_struct *kthreadd_task;