[PATCH 04/17] rtmutex: Make wait_lock irq safe

2018-11-09 Thread Henrik Austad
From: Thomas Gleixner commit b4abf91047cf054f203dcfac97e1038388826937 upstream. Sasha reported a lockdep splat about a potential deadlock between RCU boosting rtmutex and the posix timer it_lock. CPU0CPU1 rtmutex_lock(>rt_mutex)

[PATCH 04/17] rtmutex: Make wait_lock irq safe

2018-11-09 Thread Henrik Austad
From: Thomas Gleixner commit b4abf91047cf054f203dcfac97e1038388826937 upstream. Sasha reported a lockdep splat about a potential deadlock between RCU boosting rtmutex and the posix timer it_lock. CPU0CPU1 rtmutex_lock(>rt_mutex)