diff --git a/[refs] b/[refs]
index 95c09c88f858..2347d7ae9b55 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: dab175f393cdf30fbaec5978682a49dc3c890b2f
+refs/heads/master: e1637f437f1a2e552e0572e02d46e2c395a4ecaf
diff --git a/trunk/arch/m32r/Kconfig.debug b/trunk/arch/m32r/Kconfig.debug
index 36788c2c310d..31039723804f 100644
--- a/trunk/arch/m32r/Kconfig.debug
+++ b/trunk/arch/m32r/Kconfig.debug
@@ -5,6 +5,9 @@ source "lib/Kconfig.debug"
 config DEBUG_STACKOVERFLOW
 	bool "Check for stack overflows"
 	depends on DEBUG_KERNEL
+	help
+	  This option will cause messages to be printed if free stack space
+	  drops below a certain limit.
 
 config DEBUG_STACK_USAGE
 	bool "Stack utilization instrumentation"