[PATCH 4.8 10/33] locking/rtmutex: Use READ_ONCE() in rt_mutex_owner()

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Thomas Gleixner commit 1be5d4fa0af34fb7bafa205aeb59f5c7cc7a089d upstream. While debugging the rtmutex unlock vs. dequeue race Will suggested to use READ_ONCE() in

[PATCH 4.8 10/33] locking/rtmutex: Use READ_ONCE() in rt_mutex_owner()

4.8-stable review patch. If anyone has any objections, please let me know. -- From: Thomas Gleixner commit 1be5d4fa0af34fb7bafa205aeb59f5c7cc7a089d upstream. While debugging the rtmutex unlock vs. dequeue race Will suggested to use READ_ONCE() in rt_mutex_owner() as it might