Btrfs: remove csum_bytes_left

After commit 8407f553268a
("Btrfs: fix data corruption after fast fsync and writeback error"),
during wait_ordered_extents(), we wait for ordered extent setting
BTRFS_ORDERED_IO_DONE or BTRFS_ORDERED_IOERR, at which point we've
already got checksum information, so we don't need to check
(csum_bytes_left == 0) in the whole logging path.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 760c4a5e096b..47966cb3d4b6 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -198,9 +198,6 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
         entry->file_offset = file_offset;
         entry->start = start;
         entry->len = len;
-        if (!(BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM) &&
-            !(type == BTRFS_ORDERED_NOCOW))
-                entry->csum_bytes_left = disk_len;
         entry->disk_len = disk_len;
         entry->bytes_left = len;
         entry->inode = igrab(inode);
@@ -286,10 +283,6 @@ void btrfs_add_ordered_sum(struct inode *inode,
         tree = &BTRFS_I(inode)->ordered_tree;
         spin_lock_irq(&tree->lock);
         list_add_tail(&sum->list, &entry->list);
-        WARN_ON(entry->csum_bytes_left < sum->len);
-        entry->csum_bytes_left -= sum->len;
-        if (entry->csum_bytes_left == 0)
-                wake_up(&entry->wait);
         spin_unlock_irq(&tree->lock);
 }