kthread: add kthread_stop_put

[linux-block.git] / kernel / kthread.c

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 1eea53050babcdccd7a5ab7d2aaf17492fd16b36..290cbc845225e41d39994399e50ae3e82852a685 100644 (file)
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -715,6 +715,24 @@ int kthread_stop(struct task_struct *k)
 }
 EXPORT_SYMBOL(kthread_stop);
 
+/**
+ * kthread_stop_put - stop a thread and put its task struct
+ * @k: thread created by kthread_create().
+ *
+ * Stops a thread created by kthread_create() and put its task_struct.
+ * Only use when holding an extra task struct reference obtained by
+ * calling get_task_struct().
+ */
+int kthread_stop_put(struct task_struct *k)
+{
+       int ret;
+
+       ret = kthread_stop(k);
+       put_task_struct(k);
+       return ret;
+}
+EXPORT_SYMBOL(kthread_stop_put);
+
 int kthreadd(void *unused)
 {
        struct task_struct *tsk = current;