X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Facpi%2Factbl.h;h=ef2ddcadfe615fa1357c89dad54dd84df7c90c81;hb=ed03f430cdc8c802652467e9097606fedc2c7abc;hp=a46f406e1c94528c79034886dc94c0c130535116;hpb=1ee9bed173acd2f505f4e76e69d13cb2b82963e9;p=firefly-linux-kernel-4.4.55.git

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
@@ -44,6 +44,12 @@
 #ifndef __ACTBL_H__
 #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
  */