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-rw-r--r--fs/btrfs/ctree.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index ca9d8f1a3bb6..fe032ab6bd8a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -867,7 +867,8 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
if (btrfs_block_can_be_shared(root, buf)) {
ret = btrfs_lookup_extent_info(trans, root, buf->start,
- buf->len, &refs, &flags);
+ btrfs_header_level(buf), 1,
+ &refs, &flags);
if (ret)
return ret;
if (refs == 0) {