[PATCH v3 5/9] vhost: Add kthread support in function vhost_worker_queue()

[Cindy Lu <lulu@redhat.com>]

The function vhost_worker_queue() uses vhost_task_fn and
selects the different mode based on the value of inherit_owner.

Signed-off-by: Cindy Lu <lulu@redhat.com>
---
 drivers/vhost/vhost.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 603b146fccc1..8b7ddfb33c61 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -238,13 +238,18 @@ EXPORT_SYMBOL_GPL(vhost_poll_stop);
 static void vhost_worker_queue(struct vhost_worker *worker,
 			       struct vhost_work *work)
 {
+	if (!worker && !worker->fn)
+		return;
+
 	if (!test_and_set_bit(VHOST_WORK_QUEUED, &work->flags)) {
 		/* We can only add the work to the list after we're
 		 * sure it was not in the list.
 		 * test_and_set_bit() implies a memory barrier.
 		 */
 		llist_add(&work->node, &worker->work_list);
-		vhost_task_wake(worker->vtsk);
+		worker->fn->wakeup(worker->dev->inherit_owner ?
+					   (void *)worker->vtsk :
+					   (void *)worker->task);
 	}
 }
 
-- 
2.45.0