1 files changed, 0 insertions, 90 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 31c5b7c176d3..aba6dba346f4 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2714,96 +2714,6 @@ void btrfs_clear_delalloc_extent(struct btrfs_inode *inode,
 	}
 }
 
-/*
- * Split off the first pre bytes from the extent_map at [start, start + len]
- *
- * This function is intended to be used only for extract_ordered_extent().
- */
-static int split_extent_map(struct btrfs_inode *inode, u64 start, u64 len, u64 pre)
-{
-	struct extent_map_tree *em_tree = &inode->extent_tree;
-	struct extent_map *em;
-	struct extent_map *split_pre = NULL;
-	struct extent_map *split_mid = NULL;
-	int ret = 0;
-	unsigned long flags;
-
-	ASSERT(pre != 0);
-	ASSERT(pre < len);
-
-	split_pre = alloc_extent_map();
-	if (!split_pre)
-		return -ENOMEM;
-	split_mid = alloc_extent_map();
-	if (!split_mid) {
-		ret = -ENOMEM;
-		goto out_free_pre;
-	}
-
-	lock_extent(&inode->io_tree, start, start + len - 1, NULL);
-	write_lock(&em_tree->lock);
-	em = lookup_extent_mapping(em_tree, start, len);
-	if (!em) {
-		ret = -EIO;
-		goto out_unlock;
-	}
-
-	ASSERT(em->len == len);
-	ASSERT(!test_bit(EXTENT_FLAG_COMPRESSED, &em->flags));
-	ASSERT(em->block_start < EXTENT_MAP_LAST_BYTE);
-	ASSERT(test_bit(EXTENT_FLAG_PINNED, &em->flags));
-	ASSERT(!test_bit(EXTENT_FLAG_LOGGING, &em->flags));
-	ASSERT(!list_empty(&em->list));
-
-	flags = em->flags;
-	clear_bit(EXTENT_FLAG_PINNED, &em->flags);
-
-	/* First, replace the em with a new extent_map starting from * em->start */
-	split_pre->start = em->start;
-	split_pre->len = pre;
-	split_pre->orig_start = split_pre->start;
-	split_pre->block_start = em->block_start;
-	split_pre->block_len = split_pre->len;
-	split_pre->orig_block_len = split_pre->block_len;
-	split_pre->ram_bytes = split_pre->len;
-	split_pre->flags = flags;
-	split_pre->compress_type = em->compress_type;
-	split_pre->generation = em->generation;
-
-	replace_extent_mapping(em_tree, em, split_pre, 1);
-
-	/*
-	 * Now we only have an extent_map at:
-	 *     [em->start, em->start + pre]
-	 */
-
-	/* Insert the middle extent_map. */
-	split_mid->start = em->start + pre;
-	split_mid->len = em->len - pre;
-	split_mid->orig_start = split_mid->start;
-	split_mid->block_start = em->block_start + pre;
-	split_mid->block_len = split_mid->len;
-	split_mid->orig_block_len = split_mid->block_len;
-	split_mid->ram_bytes = split_mid->len;
-	split_mid->flags = flags;
-	split_mid->compress_type = em->compress_type;
-	split_mid->generation = em->generation;
-	add_extent_mapping(em_tree, split_mid, 1);
-
-	/* Once for us */
-	free_extent_map(em);
-	/* Once for the tree */
-	free_extent_map(em);
-
-out_unlock:
-	write_unlock(&em_tree->lock);
-	unlock_extent(&inode->io_tree, start, start + len - 1, NULL);
-	free_extent_map(split_mid);
-out_free_pre:
-	free_extent_map(split_pre);
-	return ret;
-}
-
 int btrfs_extract_ordered_extent(struct btrfs_bio *bbio,
 				 struct btrfs_ordered_extent *ordered)
 {