Index: arch/ia64/include/barrier.h
===================================================================
--- arch/ia64/include/barrier.h	(revision 7dd56f1bb223afc181160d339ef4306b3ed41cea)
+++ arch/ia64/include/barrier.h	(revision 511b45f949f3c6c02e2c48c637e882986fb5ebcb)
@@ -30,4 +30,7 @@
 #define __ia64_BARRIER_H__
 
+/*
+ * TODO: Implement true IA-64 memory barriers for macros below.
+ */
 #define CS_ENTER_BARRIER()	__asm__ volatile ("" ::: "memory")
 #define CS_LEAVE_BARRIER()	__asm__ volatile ("" ::: "memory")
Index: arch/mips/include/barrier.h
===================================================================
--- arch/mips/include/barrier.h	(revision 7dd56f1bb223afc181160d339ef4306b3ed41cea)
+++ arch/mips/include/barrier.h	(revision 511b45f949f3c6c02e2c48c637e882986fb5ebcb)
@@ -30,4 +30,7 @@
 #define __mips_BARRIER_H__
 
+/*
+ * TODO: implement true MIPS memory barriers for macros below.
+ */
 #define CS_ENTER_BARRIER()	__asm__ volatile ("" ::: "memory")
 #define CS_LEAVE_BARRIER()	__asm__ volatile ("" ::: "memory")