1 files changed, 6 insertions, 5 deletions

diff --git a/block/blk-merge.c b/block/blk-merge.c
index eb2a3ca58303..d926a24bf1fd 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -388,18 +388,19 @@ static int attempt_merge(struct request_queue *q, struct request *req,
 
         if (req->rq_disk) {
                 struct hd_struct *part;
+                int cpu;
 
-                rcu_read_lock();
-
+                cpu = disk_stat_lock();
                 part = disk_map_sector_rcu(req->rq_disk, req->sector);
-                disk_round_stats(req->rq_disk);
+
+                disk_round_stats(cpu, req->rq_disk);
                 req->rq_disk->in_flight--;
                 if (part) {
-                        part_round_stats(part);
+                        part_round_stats(cpu, part);
                         part->in_flight--;
                 }
 
-                rcu_read_unlock();
+                disk_stat_unlock();
         }
 
         req->ioprio = ioprio_best(req->ioprio, next->ioprio);