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-rw-r--r--fs/btrfs/ctree.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 2aa3d882aede..591151266372 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -912,6 +912,7 @@ struct btrfs_fs_info {
/* Extent buffer radix tree */
spinlock_t buffer_lock;
+ /* Entries are eb->start / sectorsize */
struct radix_tree_root buffer_radix;
/* next backup root to be overwritten */