Revert "Seperate read and write statistics of in_flight requests"
[linux-2.6.git] / drivers / md / dm.c
index 376f1ab..23e76fe 100644 (file)
@@ -130,7 +130,7 @@ struct mapped_device {
        /*
         * A list of ios that arrived while we were suspended.
         */
-       atomic_t pending[2];
+       atomic_t pending;
        wait_queue_head_t wait;
        struct work_struct work;
        struct bio_list deferred;
@@ -453,14 +453,13 @@ static void start_io_acct(struct dm_io *io)
 {
        struct mapped_device *md = io->md;
        int cpu;
-       int rw = bio_data_dir(io->bio);
 
        io->start_time = jiffies;
 
        cpu = part_stat_lock();
        part_round_stats(cpu, &dm_disk(md)->part0);
        part_stat_unlock();
-       dm_disk(md)->part0.in_flight[rw] = atomic_inc_return(&md->pending[rw]);
+       dm_disk(md)->part0.in_flight = atomic_inc_return(&md->pending);
 }
 
 static void end_io_acct(struct dm_io *io)
@@ -480,9 +479,8 @@ static void end_io_acct(struct dm_io *io)
         * After this is decremented the bio must not be touched if it is
         * a barrier.
         */
-       dm_disk(md)->part0.in_flight[rw] = pending =
-               atomic_dec_return(&md->pending[rw]);
-       pending += atomic_read(&md->pending[rw^0x1]);
+       dm_disk(md)->part0.in_flight = pending =
+               atomic_dec_return(&md->pending);
 
        /* nudge anyone waiting on suspend queue */
        if (!pending)
@@ -1787,8 +1785,7 @@ static struct mapped_device *alloc_dev(int minor)
        if (!md->disk)
                goto bad_disk;
 
-       atomic_set(&md->pending[0], 0);
-       atomic_set(&md->pending[1], 0);
+       atomic_set(&md->pending, 0);
        init_waitqueue_head(&md->wait);
        INIT_WORK(&md->work, dm_wq_work);
        init_waitqueue_head(&md->eventq);
@@ -2091,8 +2088,7 @@ static int dm_wait_for_completion(struct mapped_device *md, int interruptible)
                                break;
                        }
                        spin_unlock_irqrestore(q->queue_lock, flags);
-               } else if (!atomic_read(&md->pending[0]) &&
-                                       !atomic_read(&md->pending[1]))
+               } else if (!atomic_read(&md->pending))
                        break;
 
                if (interruptible == TASK_INTERRUPTIBLE &&