diff --git a/[refs] b/[refs]
index 2c9414d97a51..e8fd9dd98f5f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 70b6f2b4af709bded5220bcd8f3b4e255de20411
+refs/heads/master: ddf4e42c6a109392851d8843e2699bffd3c476bf
diff --git a/trunk/arch/arm/Kconfig.debug b/trunk/arch/arm/Kconfig.debug
index 18101f5f5f24..192ee01a9ba2 100644
--- a/trunk/arch/arm/Kconfig.debug
+++ b/trunk/arch/arm/Kconfig.debug
@@ -43,6 +43,12 @@ config DEBUG_ERRORS
 	  you are concerned with the code size or don't want to see these
 	  messages.
 
+config DEBUG_STACK_USAGE
+	bool "Enable stack utilization instrumentation"
+	depends on DEBUG_KERNEL
+	help
+	  Enables the display of the minimum amount of free stack which each
+	  task has ever had available in the sysrq-T output.
 
 # These options are only for real kernel hackers who want to get their hands dirty.
 config DEBUG_LL