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-rw-r--r--include/acpi/acobject.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/acpi/acobject.h b/include/acpi/acobject.h
index 28241aa15de9..d9442d346b9b 100644
--- a/include/acpi/acobject.h
+++ b/include/acpi/acobject.h
@@ -65,6 +65,10 @@
*
* descriptor_type is used to differentiate between internal descriptors, and
* must be in the same place across all descriptors
+ *
+ * Note: The descriptor_type and Type fields must appear in the identical
+ * position in both the struct acpi_namespace_node and union acpi_operand_object
+ * structures.
*/
#define ACPI_OBJECT_COMMON_HEADER \
union acpi_operand_object *next_object; /* Objects linked to parent NS node */\