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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>
hifive-unleashed-5.1
Anand Jain 2013-07-26 01:29:35 +08:00 committed by Chris Mason
parent 125bac016d
commit 8068a47e2a
1 changed files with 4 additions and 2 deletions
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6
fs/btrfs/disk-io.c
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@ -2984,9 +2984,11 @@ struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
*/
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;