--- drbd-8.3.6/drbd/drbd_req.c
+++ drbd-8.3.6/drbd/drbd_req.c
@@ -55,13 +55,21 @@
 	__disk_stat_inc(mdev->vdisk, ios[rw]);
 	__disk_stat_add(mdev->vdisk, sectors[rw], bio_sectors(bio));
 	disk_round_stats(mdev->vdisk);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	mdev->vdisk->in_flight[rw]++;
+#else
	mdev->vdisk->in_flight++;
+#endif
 #else
 	cpu = part_stat_lock();
 	part_stat_inc(cpu, &mdev->vdisk->part0, ios[rw]);
 	part_stat_add(cpu, &mdev->vdisk->part0, sectors[rw], bio_sectors(bio));
 	part_stat_unlock();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	mdev->vdisk->part0.in_flight[rw]++;
+#else
	mdev->vdisk->part0.in_flight++;
+#endif
 #endif
 }
 
@@ -77,13 +85,21 @@
 #ifdef __disk_stat_add
 	__disk_stat_add(mdev->vdisk, ticks[rw], duration);
 	disk_round_stats(mdev->vdisk);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	mdev->vdisk->in_flight[rw]--;
+#else
 	mdev->vdisk->in_flight--;
+#endif
 #else
 	cpu = part_stat_lock();
 	part_stat_add(cpu, &mdev->vdisk->part0, ticks[rw], duration);
 	part_round_stats(cpu, &mdev->vdisk->part0);
 	part_stat_unlock();
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+	mdev->vdisk->part0.in_flight[rw]--;
+#else
 	mdev->vdisk->part0.in_flight--;
+#endif
 #endif
 }