futex: Remove rt_mutex_deadlock_account_*()

These are unused and clutter up the code.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: juri.lelli@arm.com
Cc: bigeasy@linutronix.de
Cc: xlpang@redhat.com
Cc: rostedt@goodmis.org
Cc: mathieu.desnoyers@efficios.com
Cc: jdesfossez@efficios.com
Cc: dvhart@infradead.org
Cc: bristot@redhat.com
Link: http://lkml.kernel.org/r/20170322104151.652692478@infradead.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 18 insertions, 43 deletions

diff --git a/kernel/locking/rtmutex-debug.c b/kernel/locking/rtmutex-debug.c
index 97ee9df32e0f..32fe775a2eaf 100644
--- a/kernel/locking/rtmutex-debug.c
+++ b/kernel/locking/rtmutex-debug.c
@@ -174,12 +174,3 @@ void debug_rt_mutex_init(struct rt_mutex *lock, const char *name)
         lock->name = name;
 }
 
-void
-rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task)
-{
-}
-
-void rt_mutex_deadlock_account_unlock(struct task_struct *task)
-{
-}
-
diff --git a/kernel/locking/rtmutex-debug.h b/kernel/locking/rtmutex-debug.h
index d0519c3432b6..b585af9a1b50 100644
--- a/kernel/locking/rtmutex-debug.h
+++ b/kernel/locking/rtmutex-debug.h
@@ -9,9 +9,6 @@
  * This file contains macros used solely by rtmutex.c. Debug version.
  */
 
-extern void
-rt_mutex_deadlock_account_lock(struct rt_mutex *lock, struct task_struct *task);
-extern void rt_mutex_deadlock_account_unlock(struct task_struct *task);
 extern void debug_rt_mutex_init_waiter(struct rt_mutex_waiter *waiter);
 extern void debug_rt_mutex_free_waiter(struct rt_mutex_waiter *waiter);
 extern void debug_rt_mutex_init(struct rt_mutex *lock, const char *name);
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 6edc32ecd9c5..bab66cbe3b37 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -938,8 +938,6 @@ takeit:
          */
         rt_mutex_set_owner(lock, task);
 
-        rt_mutex_deadlock_account_lock(lock, task);
-
         return 1;
 }
 
@@ -1342,8 +1340,6 @@ static bool __sched rt_mutex_slowunlock(struct rt_mutex *lock,
 
         debug_rt_mutex_unlock(lock);
 
-        rt_mutex_deadlock_account_unlock(current);
-
         /*
          * We must be careful here if the fast path is enabled. If we
          * have no waiters queued we cannot set owner to NULL here
@@ -1409,11 +1405,10 @@ rt_mutex_fastlock(struct rt_mutex *lock, int state,
                                 struct hrtimer_sleeper *timeout,
                                 enum rtmutex_chainwalk chwalk))
 {
-        if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
-                rt_mutex_deadlock_account_lock(lock, current);
+        if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
                 return 0;
-        } else
-                return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK);
+
+        return slowfn(lock, state, NULL, RT_MUTEX_MIN_CHAINWALK);
 }
 
 static inline int
@@ -1425,21 +1420,19 @@ rt_mutex_timed_fastlock(struct rt_mutex *lock, int state,
                                       enum rtmutex_chainwalk chwalk))
 {
         if (chwalk == RT_MUTEX_MIN_CHAINWALK &&
-            likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
-                rt_mutex_deadlock_account_lock(lock, current);
+            likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
                 return 0;
-        } else
-                return slowfn(lock, state, timeout, chwalk);
+
+        return slowfn(lock, state, timeout, chwalk);
 }
 
 static inline int
 rt_mutex_fasttrylock(struct rt_mutex *lock,
                      int (*slowfn)(struct rt_mutex *lock))
 {
-        if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current))) {
-                rt_mutex_deadlock_account_lock(lock, current);
+        if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
                 return 1;
-        }
+
         return slowfn(lock);
 }
 
@@ -1449,19 +1442,18 @@ rt_mutex_fastunlock(struct rt_mutex *lock,
                                    struct wake_q_head *wqh))
 {
         DEFINE_WAKE_Q(wake_q);
+        bool deboost;
 
-        if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
-                rt_mutex_deadlock_account_unlock(current);
+        if (likely(rt_mutex_cmpxchg_release(lock, current, NULL)))
+                return;
 
-        } else {
-                bool deboost = slowfn(lock, &wake_q);
+        deboost = slowfn(lock, &wake_q);
 
-                wake_up_q(&wake_q);
+        wake_up_q(&wake_q);
 
-                /* Undo pi boosting if necessary: */
-                if (deboost)
-                        rt_mutex_adjust_prio(current);
-        }
+        /* Undo pi boosting if necessary: */
+        if (deboost)
+                rt_mutex_adjust_prio(current);
 }
 
 /**
@@ -1572,10 +1564,9 @@ EXPORT_SYMBOL_GPL(rt_mutex_unlock);
 bool __sched rt_mutex_futex_unlock(struct rt_mutex *lock,
                                    struct wake_q_head *wqh)
 {
-        if (likely(rt_mutex_cmpxchg_release(lock, current, NULL))) {
-                rt_mutex_deadlock_account_unlock(current);
+        if (likely(rt_mutex_cmpxchg_release(lock, current, NULL)))
                 return false;
-        }
+
         return rt_mutex_slowunlock(lock, wqh);
 }
 
@@ -1637,7 +1628,6 @@ void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
         __rt_mutex_init(lock, NULL);
         debug_rt_mutex_proxy_lock(lock, proxy_owner);
         rt_mutex_set_owner(lock, proxy_owner);
-        rt_mutex_deadlock_account_lock(lock, proxy_owner);
 }
 
 /**
@@ -1657,7 +1647,6 @@ void rt_mutex_proxy_unlock(struct rt_mutex *lock,
 {
         debug_rt_mutex_proxy_unlock(lock);
         rt_mutex_set_owner(lock, NULL);
-        rt_mutex_deadlock_account_unlock(proxy_owner);
 }
 
 /**
diff --git a/kernel/locking/rtmutex.h b/kernel/locking/rtmutex.h
index c4060584c407..6607802efa8b 100644
--- a/kernel/locking/rtmutex.h
+++ b/kernel/locking/rtmutex.h
@@ -11,8 +11,6 @@
  */
 
 #define rt_mutex_deadlock_check(l)                      (0)
-#define rt_mutex_deadlock_account_lock(m, t)            do { } while (0)
-#define rt_mutex_deadlock_account_unlock(l)             do { } while (0)
 #define debug_rt_mutex_init_waiter(w)                   do { } while (0)
 #define debug_rt_mutex_free_waiter(w)                   do { } while (0)
 #define debug_rt_mutex_lock(l)                          do { } while (0)