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-rw-r--r--fs/btrfs/transaction.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 259f74eabdb8..44a5d73fddbe 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -312,6 +312,7 @@ start_transaction(struct btrfs_root *root, u64 num_items, int type,
WARN_ON(type != TRANS_JOIN && type != TRANS_JOIN_NOLOCK);
h = current->journal_info;
h->use_count++;
+ WARN_ON(h->use_count > 2);
h->orig_rsv = h->block_rsv;
h->block_rsv = NULL;
goto got_it;
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