@@ -805,6 +805,15 @@ static int adaptive_wait(struct rt_mutex_waiter *waiter,
 }
 #endif
 
+static void init_waiter(struct rt_mutex_waiter *waiter)
+{
+	memset(waiter, 0, sizeof(*waiter));
+
+	debug_rt_mutex_init_waiter(waiter);
+	waiter->task = NULL;
+	waiter->write_lock = 0;
+}
+
 /*
  * Slow path lock function spin_lock style: this variant is very
  * careful not to miss any non-lock wakeups.

@@ -823,9 +832,7 @@ rt_spin_lock_slowlock(struct rt_mutex *lock)
 	struct task_struct *orig_owner;
 	int missed = 0;
 
-	debug_rt_mutex_init_waiter(&waiter);
-	waiter.task = NULL;
-	waiter.write_lock = 0;
+	init_waiter(&waiter);
 
 	spin_lock_irqsave(&lock->wait_lock, flags);
 	init_lists(lock);

@@ -1324,6 +1331,8 @@ rt_read_slowlock(struct rw_mutex *rwm, int mtx)
 	int saved_lock_depth = -1;
 	unsigned long saved_state = -1, state, flags;
 
+	init_waiter(&waiter);
+
 	spin_lock_irqsave(&mutex->wait_lock, flags);
 	init_rw_lists(rwm);
 

@@ -1335,10 +1344,6 @@ rt_read_slowlock(struct rw_mutex *rwm, int mtx)
 
 	/* Owner is a writer (or a blocked writer). Block on the lock */
 
-	debug_rt_mutex_init_waiter(&waiter);
-	waiter.task = NULL;
-	waiter.write_lock = 0;
-
 	if (mtx) {
 		/*
 		 * We drop the BKL here before we go into the wait loop to avoid a

@@ -1538,8 +1543,7 @@ rt_write_slowlock(struct rw_mutex *rwm, int mtx)
 	int saved_lock_depth = -1;
 	unsigned long flags, saved_state = -1, state;
 
-	debug_rt_mutex_init_waiter(&waiter);
-	waiter.task = NULL;
+	init_waiter(&waiter);
 
 	/* we do PI different for writers that are blocked */
 	waiter.write_lock = 1;

@@ -2270,9 +2274,7 @@ rt_mutex_slowlock(struct rt_mutex *lock, int state,
 	struct rt_mutex_waiter waiter;
 	unsigned long flags;
 
-	debug_rt_mutex_init_waiter(&waiter);
-	waiter.task = NULL;
-	waiter.write_lock = 0;
+	init_waiter(&waiter);
 
 	spin_lock_irqsave(&lock->wait_lock, flags);
 	init_lists(lock);