Btrfs: update the comment of total_bytes and disk_total_bytes of btrfs_devie

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 0defd232e290..90d4fa80bd58 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -64,10 +64,10 @@ struct btrfs_device {
         /* the internal btrfs device id */
         u64 devid;
 
-        /* size of the device */
+        /* size of the device in memory */
         u64 total_bytes;
 
-        /* size of the disk */
+        /* size of the device on disk */
         u64 disk_total_bytes;
 
         /* bytes used */