From 68cc3990a545dc0da221b4844dd8b9c06623a6c5 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 5 Oct 2011 13:20:24 +0200
Subject: rtmutex: Add missing rcu_read_unlock() in
 debug_rt_mutex_print_deadlock()

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/rtmutex-debug.c b/kernel/rtmutex-debug.c
index cb1ced6..a2e7e72 100644
--- a/kernel/rtmutex-debug.c
+++ b/kernel/rtmutex-debug.c
@@ -94,8 +94,10 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
 		return;
 	}
 
-	if (!debug_locks_off())
+	if (!debug_locks_off()) {
+		rcu_read_unlock();
 		return;
+	}
 
 	printk("\n============================================\n");
 	printk(  "[ BUG: circular locking deadlock detected! ]\n");
-- 
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