============================================================
--- kernel/Kconfig.preempt	3148bd94270ea0a853d8e443616cd7a668dd0d3b
+++ kernel/Kconfig.preempt	d63831dbfbb9e68386bfc862fd2dd1a8f1e9779f
@@ -176,3 +176,12 @@ config RCU_TRACE
 
 	  Say Y here if you want to enable RCU tracing
 	  Say N if you are unsure.
+
+config LOCK_STAT
+	bool "Lock contention statistics tracking in /proc"
+	depends on PREEMPT_RT && !DEBUG_RT_MUTEXES
+	default y
+	help
+	  General lock statistics tracking with regard to contention in
+	  /proc/lock_stat/contention
+
============================================================
--- kernel/Makefile	0690fbe8c605a1c7e24b7b94d05a96ea32574aab
+++ kernel/Makefile	08087775b67b7ac1682dac0310003ef7ecbd7e70
@@ -63,6 +63,7 @@ obj-$(CONFIG_TASKSTATS) += taskstats.o t
 obj-$(CONFIG_UTS_NS) += utsname.o
 obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
 obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
+obj-$(CONFIG_LOCK_STAT) += lock_stat.o
 
 ifneq ($(CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER),y)
 # According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is