Btrfs: variable block size support

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 3767744f659e..d4f1ec328399 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -143,7 +143,6 @@ static int __free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks)
         struct btrfs_key key;
         struct btrfs_root *extent_root = root->extent_root;
         int ret;
-        struct btrfs_item *item;
         struct btrfs_extent_item *ei;
         struct btrfs_key ins;
         u32 refs;
@@ -161,9 +160,8 @@ static int __free_extent(struct btrfs_root *root, u64 blocknr, u64 num_blocks)
                 printf("failed to find %Lu\n", key.objectid);
                 BUG();
         }
-        item = path.nodes[0]->leaf.items + path.slots[0];
-        ei = (struct btrfs_extent_item *)(path.nodes[0]->leaf.data +
-                                    btrfs_item_offset(item));
+        ei = btrfs_item_ptr(&path.nodes[0]->leaf, path.slots[0],
+                            struct btrfs_extent_item);
         BUG_ON(ei->refs == 0);
         refs = btrfs_extent_refs(ei) - 1;
         btrfs_set_extent_refs(ei, refs);