Add a real API for dealing with blk_congestion_wait()
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index e630188..77a0bc4 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -803,6 +803,15 @@
EXPORT_SYMBOL(test_set_page_writeback);
/*
+ * Wakes up tasks that are being throttled due to writeback congestion
+ */
+void writeback_congestion_end(void)
+{
+ blk_congestion_end(WRITE);
+}
+EXPORT_SYMBOL(writeback_congestion_end);
+
+/*
* Return true if any of the pages in the mapping are marged with the
* passed tag.
*/