diff -Naur linux-4.8.orig/kernel/locking/mutex-debug.c linux-4.8/kernel/locking/mutex-debug.c
--- linux-4.8.orig/kernel/locking/mutex-debug.c	2017-01-06 16:33:57.091008435 +0100
+++ linux-4.8/kernel/locking/mutex-debug.c	2017-01-06 16:34:39.512009384 +0100
@@ -117,4 +117,4 @@
 	lock->magic = NULL;
 }
 
-EXPORT_SYMBOL_GPL(mutex_destroy);
+EXPORT_SYMBOL(mutex_destroy);
diff -Naur linux-4.8.orig/kernel/locking/rtmutex.c linux-4.8/kernel/locking/rtmutex.c
--- linux-4.8.orig/kernel/locking/rtmutex.c	2017-01-06 16:33:57.091008435 +0100
+++ linux-4.8/kernel/locking/rtmutex.c	2017-01-06 16:35:30.555010526 +0100
@@ -1529,7 +1529,7 @@
 #endif
 }
 
-EXPORT_SYMBOL_GPL(rt_mutex_destroy);
+EXPORT_SYMBOL(rt_mutex_destroy);
 
 /**
  * __rt_mutex_init - initialize the rt lock