bcachefs: comment bch_subvolume

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/bcachefs_format.h b/fs/bcachefs/bcachefs_format.h
index a76036179238eeedae570214529643e2f10f1280..6abd19cdbfcfe24420aabc4f1752cc8651c08e78 100644 (file)
--- a/fs/bcachefs/bcachefs_format.h
+++ b/fs/bcachefs/bcachefs_format.h
@@ -1123,6 +1123,9 @@ struct bch_subvolume {
         * Snapshot subvolumes form a tree, separate from the snapshot nodes
         * tree - if this subvolume is a snapshot, this is the ID of the
         * subvolume it was created from:
+        *
+        * This is _not_ necessarily the subvolume of the directory containing
+        * this subvolume:
         */
        __le32                  parent;
        __le32                  pad;