wait: add wake_up_pollfree()

[sfrench/cifs-2.6.git] / kernel / sched / wait.c

diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index 76577d1642a5dc6fa6eb15048210414bd0591265..eca38107b32f162adad278aee6e522bdfe04c026 100644 (file)
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -238,6 +238,13 @@ void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode)
 }
 EXPORT_SYMBOL_GPL(__wake_up_sync);     /* For internal use only */
 
+void __wake_up_pollfree(struct wait_queue_head *wq_head)
+{
+       __wake_up(wq_head, TASK_NORMAL, 0, poll_to_key(EPOLLHUP | POLLFREE));
+       /* POLLFREE must have cleared the queue. */
+       WARN_ON_ONCE(waitqueue_active(wq_head));
+}
+
 /*
  * Note: we use "set_current_state()" _after_ the wait-queue add,
  * because we need a memory barrier there on SMP, so that any