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-rw-r--r--block/ll_rw_blk.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 556a3d354ea..9c3a06bcb7b 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2801,6 +2801,18 @@ long blk_congestion_wait(int rw, long timeout)
EXPORT_SYMBOL(blk_congestion_wait);
+/**
+ * blk_congestion_end - wake up sleepers on a congestion queue
+ * @rw: READ or WRITE
+ */
+void blk_congestion_end(int rw)
+{
+ wait_queue_head_t *wqh = &congestion_wqh[rw];
+
+ if (waitqueue_active(wqh))
+ wake_up(wqh);
+}
+
/*
* Has to be called with the request spinlock acquired
*/