[PATCH 4.4 13/72] writeback: fix the wrong congested state variable definition

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kaixu Xia <xiakaixu@xxxxxxxxxx>

commit c877ef8ae7b8edaedccad0fc8c23d4d1de7e2480 upstream.

The right variable definition should be wb_congested_state that
include WB_async_congested and WB_sync_congested. So fix it.

Signed-off-by: Kaixu Xia <xiakaixu@xxxxxxxxxx>
Acked-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Cc: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 mm/backing-dev.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -922,7 +922,7 @@ static atomic_t nr_wb_congested[2];
 void clear_wb_congested(struct bdi_writeback_congested *congested, int sync)
 {
 	wait_queue_head_t *wqh = &congestion_wqh[sync];
-	enum wb_state bit;
+	enum wb_congested_state bit;
 
 	bit = sync ? WB_sync_congested : WB_async_congested;
 	if (test_and_clear_bit(bit, &congested->state))
@@ -935,7 +935,7 @@ EXPORT_SYMBOL(clear_wb_congested);
 
 void set_wb_congested(struct bdi_writeback_congested *congested, int sync)
 {
-	enum wb_state bit;
+	enum wb_congested_state bit;
 
 	bit = sync ? WB_sync_congested : WB_async_congested;
 	if (!test_and_set_bit(bit, &congested->state))