btrfs: remove unused function heads_to_leaves

There's no callers in-tree anymore since commit 64403612b73a ("btrfs:
rework btrfs_check_space_for_delayed_refs")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index faa585d..3593f8c 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2114,22 +2114,6 @@ static u64 find_middle(struct rb_root *root)
 }
 #endif
 
-static inline u64 heads_to_leaves(struct btrfs_fs_info *fs_info, u64 heads)
-{
-       u64 num_bytes;
-
-       num_bytes = heads * (sizeof(struct btrfs_extent_item) +
-                            sizeof(struct btrfs_extent_inline_ref));
-       if (!btrfs_fs_incompat(fs_info, SKINNY_METADATA))
-               num_bytes += heads * sizeof(struct btrfs_tree_block_info);
-
-       /*
-        * We don't ever fill up leaves all the way so multiply by 2 just to be
-        * closer to what we're really going to want to use.
-        */
-       return div_u64(num_bytes, BTRFS_LEAF_DATA_SIZE(fs_info));
-}
-
 /*
  * Takes the number of bytes to be csumm'ed and figures out how many leaves it
  * would require to store the csums for that many bytes.