Revert "block: fix accounting bug on cross partition merges"
[linux-3.10.git] / block / blk-core.c
index 51efd83..f854887 100644 (file)
@@ -64,15 +64,13 @@ static void drive_stat_acct(struct request *rq, int new_io)
                return;
 
        cpu = part_stat_lock();
+       part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
 
-       if (!new_io) {
-               part = rq->part;
+       if (!new_io)
                part_stat_inc(cpu, part, merges[rw]);
-       } else {
-               part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
+       else {
                part_round_stats(cpu, part);
                part_inc_in_flight(part, rw);
-               rq->part = part;
        }
 
        part_stat_unlock();
@@ -130,7 +128,6 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
        rq->ref_count = 1;
        rq->start_time = jiffies;
        set_start_time_ns(rq);
-       rq->part = NULL;
 }
 EXPORT_SYMBOL(blk_rq_init);
 
@@ -805,16 +802,11 @@ static struct request *get_request(struct request_queue *q, int rw_flags,
        rl->starved[is_sync] = 0;
 
        priv = !test_bit(QUEUE_FLAG_ELVSWITCH, &q->queue_flags);
-       if (priv) {
+       if (priv)
                rl->elvpriv++;
 
-               /*
-                * Don't do stats for non-priv requests
-                */
-               if (blk_queue_io_stat(q))
-                       rw_flags |= REQ_IO_STAT;
-       }
-
+       if (blk_queue_io_stat(q))
+               rw_flags |= REQ_IO_STAT;
        spin_unlock_irq(q->queue_lock);
 
        rq = blk_alloc_request(q, rw_flags, priv, gfp_mask);
@@ -1791,7 +1783,7 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
                int cpu;
 
                cpu = part_stat_lock();
-               part = req->part;
+               part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
                part_stat_add(cpu, part, sectors[rw], bytes >> 9);
                part_stat_unlock();
        }
@@ -1811,7 +1803,7 @@ static void blk_account_io_done(struct request *req)
                int cpu;
 
                cpu = part_stat_lock();
-               part = req->part;
+               part = disk_map_sector_rcu(req->rq_disk, blk_rq_pos(req));
 
                part_stat_inc(cpu, part, ios[rw]);
                part_stat_add(cpu, part, ticks[rw], duration);