Update columns.h comment.

diff --git a/lib/report/columns.h b/lib/report/columns.h
index 707347bbdbc86d85a39c398061d162e9237638e0..d1dbc1c60778f3254b85f6dace51e30a4773c8ca 100644 (file)
--- a/lib/report/columns.h
+++ b/lib/report/columns.h
@@ -35,7 +35,10 @@
  * it is pointer that may be used to derive the data value (for example,
  * seg_count - see _lvsegcount_disp()).  In the FIELD macro definition,
  * this is used in an offset calculation to derive the offset to the
- * data value from the containing struct base address.
+ * data value from the containing struct base address.  Note that in some
+ * cases, the argument is the first member of the struct, in which case the
+ * data value pointer points to the start of the struct itself (for example,
+ * 'lvid' field of struct 'lv').
  * 6. Minimum display width.  This is the minimum width used to display
  * the field value.
  * 7. Display function identifier.  Used to derive the full name of the