On Wed, Feb 15, 2017 at 01:56:45AM +0900, Sergey Senozhatsky wrote: > that crossed my mind, but I kinda assumed that we do printk() from > under tk_core using sched fair, and rt_runtime_lock is from sched rt.
That's all true; lockdep doesn't care :-) All it knows is that at some point those locks nest.
