diff --git a/arch b/arch
index 88ef94c7b32..8012d549ae5 160000
--- a/arch
+++ b/arch
@@ -1 +1 @@
-Subproject commit 88ef94c7b32a793e11a7d0eb75b0f6c839a59a91
+Subproject commit 8012d549ae583abf8e6d902a42fe6e1a534bb2a5
diff --git a/include/nuttx/arch.h b/include/nuttx/arch.h
index bec1aab8e13..c50c598fe64 100644
--- a/include/nuttx/arch.h
+++ b/include/nuttx/arch.h
@@ -1690,9 +1690,13 @@ int up_cpundx(void);
  *   initialization of the OS, just before beginning normal multitasking,
  *   the additional CPUs would be started by calling this function.
  *
- *   Each CPU is provided the entry point to is IDLE task when started.  The
- *   OS initialization logic calls this function repeatedly until each CPU
- *   has been started.
+ *   Each CPU is provided the entry point to is IDLE task when started.  A
+ *   TCB for each CPU's IDLE task has been initialized and placed in the
+ *   CPU's g_assignedtasks[cpu] list.  Not stack has been alloced or
+ *   initialized.
+ *
+ *   The OS initialization logic calls this function repeatedly until each
+ *   CPU has been started, 1 through (CONFIG_SMP_NCPUS-1).
  *
  * Input Parameters:
  *   cpu - The index of the CPU being started.  This will be a numeric