rtmutex: Add missing rcu_read_unlock() in debug_rt_mutex_print_deadlock()

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

1 files changed, 3 insertions, 1 deletions

diff --git a/kernel/rtmutex-debug.c b/kernel/rtmutex-debug.c
index cb1ced6967ad..a2e7e7210f3e 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");