btrfs: use BTRFS_SUPER_INFO_SIZE macro at btrfs_read_dev_super()
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8e2eee6..1356435 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2984,9 +2984,11 @@
*/
for (i = 0; i < 1; i++) {
bytenr = btrfs_sb_offset(i);
- if (bytenr + 4096 >= i_size_read(bdev->bd_inode))
+ if (bytenr + BTRFS_SUPER_INFO_SIZE >=
+ i_size_read(bdev->bd_inode))
break;
- bh = __bread(bdev, bytenr / 4096, 4096);
+ bh = __bread(bdev, bytenr / 4096,
+ BTRFS_SUPER_INFO_SIZE);
if (!bh)
continue;