locking/rtmutex: Move rt_mutex_debug_task_free() to rtmutex.c

Prepare for removing the header maze.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210326153943.646359691@linutronix.de

kernel/locking/rtmutex-debug.c

@@ -32,12 +32,6 @@
 
 #include "rtmutex_common.h"
 
-void rt_mutex_debug_task_free(struct task_struct *task)
-{
-	DEBUG_LOCKS_WARN_ON(!RB_EMPTY_ROOT(&task->pi_waiters.rb_root));
-	DEBUG_LOCKS_WARN_ON(task->pi_blocked_on);
-}
-
 void debug_rt_mutex_unlock(struct rt_mutex *lock)
 {
 	DEBUG_LOCKS_WARN_ON(rt_mutex_owner(lock) != current);

kernel/locking/rtmutex.c

@@ -1813,3 +1813,11 @@ bool rt_mutex_cleanup_proxy_lock(struct rt_mutex *lock,
 
 	return cleanup;
 }
+
+#ifdef CONFIG_DEBUG_RT_MUTEXES
+void rt_mutex_debug_task_free(struct task_struct *task)
+{
+	DEBUG_LOCKS_WARN_ON(!RB_EMPTY_ROOT(&task->pi_waiters.rb_root));
+	DEBUG_LOCKS_WARN_ON(task->pi_blocked_on);
+}
+#endif