1 files changed, 18 insertions, 4 deletions

diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h
index 7431a9c86f35..855212501407 100644
--- a/kernel/locking/rtmutex_common.h
+++ b/kernel/locking/rtmutex_common.h
@@ -102,6 +102,21 @@ static inline struct task_struct *rt_mutex_owner(struct rt_mutex *lock)
 }
 
 /*
+ * Constants for rt mutex functions which have a selectable deadlock
+ * detection.
+ *
+ * RT_MUTEX_MIN_CHAINWALK:      Stops the lock chain walk when there are
+ *                              no further PI adjustments to be made.
+ *
+ * RT_MUTEX_FULL_CHAINWALK:     Invoke deadlock detection with a full
+ *                              walk of the lock chain.
+ */
+enum rtmutex_chainwalk {
+        RT_MUTEX_MIN_CHAINWALK,
+        RT_MUTEX_FULL_CHAINWALK,
+};
+
+/*
  * PI-futex support (proxy locking functions, etc.):
  */
 extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock);
@@ -111,12 +126,11 @@ extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
                                   struct task_struct *proxy_owner);
 extern int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
                                      struct rt_mutex_waiter *waiter,
-                                     struct task_struct *task,
-                                     int detect_deadlock);
+                                     struct task_struct *task);
 extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
                                       struct hrtimer_sleeper *to,
-                                      struct rt_mutex_waiter *waiter,
-                                      int detect_deadlock);
+                                      struct rt_mutex_waiter *waiter);
+extern int rt_mutex_timed_futex_lock(struct rt_mutex *l, struct hrtimer_sleeper *to);
 
 #ifdef CONFIG_DEBUG_RT_MUTEXES
 # include "rtmutex-debug.h"