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-rw-r--r--source/components/tables/tbdata.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/source/components/tables/tbdata.c b/source/components/tables/tbdata.c
index 47096186fa1c..18e58f9d4c6f 100644
--- a/source/components/tables/tbdata.c
+++ b/source/components/tables/tbdata.c
@@ -648,6 +648,8 @@ AcpiTbCheckDuplication (
*
* DESCRIPTION: This function is called to validate and verify the table, the
* returned table descriptor is in "VALIDATED" state.
+ * Note that 'TableIndex' is required to be set to !NULL to
+ * enable duplication check.
*
*****************************************************************************/