blk-stat: kill blk_stat_rq_ddir()

No point in providing and exporting this helper. There's just
one (real) user of it, just use rq_data_dir().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 26e1bb617877..17676f4d7fd1 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -696,6 +696,11 @@ u64 wbt_default_latency_nsec(struct request_queue *q)
                 return 75000000ULL;
 }
 
+static int wbt_data_dir(const struct request *rq)
+{
+        return rq_data_dir(rq);
+}
+
 int wbt_init(struct request_queue *q)
 {
         struct rq_wb *rwb;
@@ -707,7 +712,7 @@ int wbt_init(struct request_queue *q)
         if (!rwb)
                 return -ENOMEM;
 
-        rwb->cb = blk_stat_alloc_callback(wb_timer_fn, blk_stat_rq_ddir, 2, rwb);
+        rwb->cb = blk_stat_alloc_callback(wb_timer_fn, wbt_data_dir, 2, rwb);
         if (!rwb->cb) {
                 kfree(rwb);
                 return -ENOMEM;