1 files changed, 6 insertions, 0 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index cc2eadaf7a27..f7c20123a1fe 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -85,6 +85,9 @@ struct btrfs_device {
         /* physical drive uuid (or lvm uuid) */
         u8 uuid[BTRFS_UUID_SIZE];
 
+        /* per-device scrub information */
+        struct scrub_dev *scrub_device;
+
         struct btrfs_work work;
 };
 
@@ -157,6 +160,9 @@ struct map_lookup {
         struct btrfs_bio_stripe stripes[];
 };
 
+#define map_lookup_size(n) (sizeof(struct map_lookup) + \
+                            (sizeof(struct btrfs_bio_stripe) * (n)))
+
 /* Used to sort the devices by max_avail(descending sort) */
 int btrfs_cmp_device_free_bytes(const void *dev_info1, const void *dev_info2);