From 162cc2794df37662beb7f97ddd1dd5bffaf85e9a Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Date: Wed, 23 Sep 2009 16:18:13 -0700
Subject: rcu: Fix rcu_lock_map build failure on CONFIG_PROVE_LOCKING=y

Move the rcu_lock_map definition from rcutree.c to rcupdate.c so that
TINY_RCU can use lockdep.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/rcupdate.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'kernel/rcupdate.c')

diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 8e795133b33..4a189ea18b4 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -46,6 +46,13 @@
 #include <linux/module.h>
 #include <linux/kernel_stat.h>
 
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+static struct lock_class_key rcu_lock_key;
+struct lockdep_map rcu_lock_map =
+	STATIC_LOCKDEP_MAP_INIT("rcu_read_lock", &rcu_lock_key);
+EXPORT_SYMBOL_GPL(rcu_lock_map);
+#endif
+
 enum rcu_barrier {
 	RCU_BARRIER_STD,
 	RCU_BARRIER_BH,
-- 
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