[PATCH] Btrfs: remove level==0 check in balance_level

[Liu Bo]

btrfs_search_slot()
   if (level != 0)
      setup_nodes_for_search()
          balance_level()

It is just impossible to have level=0 in balance_level.

Signed-off-by: Liu Bo <bo....@linux.alibaba.com>
---
 fs/btrfs/ctree.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8b31caa60b0a..858085490e23 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1778,9 +1778,6 @@ static noinline int balance_level(struct 
btrfs_trans_handle *trans,
        int orig_slot = path->slots[level];
        u64 orig_ptr;
 
-       if (level == 0)
-               return 0;
-
        mid = path->nodes[level];
 
        WARN_ON(path->locks[level] != BTRFS_WRITE_LOCK &&
-- 
1.8.3.1