From f5a957158d1e6469efe7435008cc12919aa61cc1 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Wed, 22 Mar 2017 06:29:38 -0600
Subject: [PATCH] Review of last PR:  Setting CONFIG_SMP_NCPUS=1 should only be
 permitted in a debug configuration.

---
 sched/Kconfig | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sched/Kconfig b/sched/Kconfig
index 68eea620cff..3a5807d4dcc 100644
--- a/sched/Kconfig
+++ b/sched/Kconfig
@@ -263,11 +263,17 @@ if SMP
 config SMP_NCPUS
 	int "Number of CPUs"
 	default 4
-	range 1 32
+	range 1 32 if DEBUG_FEATURES
+	range 2 32 if !DEBUG_FEATURES
 	---help---
 		This value identifies the number of CPUs supported by the processor
 		that will be used for SMP.
 
+		If CONFIG_DEBUG_FEATURES is enbled, then the value one is permitted
+		for CONFIG_SMP_NCPUS.  This is not normally a valid setting for an
+		SMP configuration.  However, running the SMP logic in a single CPU
+		configuration is useful during certain testing.
+
 config SMP_IDLETHREAD_STACKSIZE
 	int "CPU IDLE stack size"
 	default 2048