On 2017-09-21 12:31:05 [-0400], Steven Rostedt wrote: > > diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c > > index f03876322d4a..79f49d73e4d0 100644 > > --- a/kernel/locking/rtmutex.c > > +++ b/kernel/locking/rtmutex.c > > @@ -2281,7 +2281,6 @@ int __rt_mutex_start_proxy_lock(struct rt_mutex *lock, > > raw_spin_lock(&task->pi_lock); > > if (task->pi_blocked_on) { > > raw_spin_unlock(&task->pi_lock); > > - raw_spin_unlock_irq(&lock->wait_lock); > > Hmm, before this patch, irqs are enabled when returning with -EAGAIN. > But now they are not. Should that be: > > raw_spin_unlock_irq(&taks->pi_lock); > > or is there something that changes this?
There is something else. Before that futex rework there was just rt_mutex_start_proxy_lock() and it did lock & unlock of ->wait_lock. This no longer the case after the rework. So now the caller does this. > -- Steve Sebastian