writeback: remove {set,clear}_wb_congested

Just merge them into their only callers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

include/linux/backing-dev-defs.h

@@ -232,18 +232,8 @@ enum {
 	BLK_RW_SYNC	= 1,
 };
 
-void clear_wb_congested(struct bdi_writeback_congested *congested, int sync);
-void set_wb_congested(struct bdi_writeback_congested *congested, int sync);
-
-static inline void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
-{
-	clear_wb_congested(bdi->wb.congested, sync);
-}
-
-static inline void set_bdi_congested(struct backing_dev_info *bdi, int sync)
-{
-	set_wb_congested(bdi->wb.congested, sync);
-}
+void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
+void set_bdi_congested(struct backing_dev_info *bdi, int sync);
 
 struct wb_lock_cookie {
 	bool locked;

mm/backing-dev.c

@@ -1047,29 +1047,29 @@ static wait_queue_head_t congestion_wqh[2] = {
 	};
 static atomic_t nr_wb_congested[2];
 
-void clear_wb_congested(struct bdi_writeback_congested *congested, int sync)
+void clear_bdi_congested(struct backing_dev_info *bdi, int sync)
 {
 	wait_queue_head_t *wqh = &congestion_wqh[sync];
 	enum wb_congested_state bit;
 
 	bit = sync ? WB_sync_congested : WB_async_congested;
-	if (test_and_clear_bit(bit, &congested->state))
+	if (test_and_clear_bit(bit, &bdi->wb.congested->state))
 		atomic_dec(&nr_wb_congested[sync]);
 	smp_mb__after_atomic();
 	if (waitqueue_active(wqh))
 		wake_up(wqh);
 }
-EXPORT_SYMBOL(clear_wb_congested);
+EXPORT_SYMBOL(clear_bdi_congested);
 
-void set_wb_congested(struct bdi_writeback_congested *congested, int sync)
+void set_bdi_congested(struct backing_dev_info *bdi, int sync)
 {
 	enum wb_congested_state bit;
 
 	bit = sync ? WB_sync_congested : WB_async_congested;
-	if (!test_and_set_bit(bit, &congested->state))
+	if (!test_and_set_bit(bit, &bdi->wb.congested->state))
 		atomic_inc(&nr_wb_congested[sync]);
 }
-EXPORT_SYMBOL(set_wb_congested);
+EXPORT_SYMBOL(set_bdi_congested);
 
 /**
  * congestion_wait - wait for a backing_dev to become uncongested