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-rw-r--r--include/acpi/actbl.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/acpi/actbl.h b/include/acpi/actbl.h
index a46f406e1c94..ef2ddcadfe61 100644
--- a/include/acpi/actbl.h
+++ b/include/acpi/actbl.h
@@ -45,6 +45,12 @@
#define __ACTBL_H__
/*
+ * Note about bitfields: The u8 type is used for bitfields in ACPI tables.
+ * This is the only type that is even remotely portable. Anything else is not
+ * portable, so do not use any other bitfield types.
+ */
+
+/*
* Values for description table header signatures
*/
#define RSDP_NAME "RSDP"