On Monday, February 29, 2016 04:49:24 PM Thomas Gleixner wrote: > On Sun, 28 Feb 2016, Thomas Gleixner wrote: > > > > Understood. I'll fix that thing up so that won't happen and I put it on the > > list of things to look at deeper. > > The below delta patch should do what you need, right?
Yup, thanks! Rafael > 8<------------- > > --- a/kernel/cpu.c > +++ b/kernel/cpu.c > @@ -1461,6 +1461,11 @@ static ssize_t write_cpuhp_target(struct > if (target != CPUHP_OFFLINE && target != CPUHP_ONLINE) > return -EINVAL; > #endif > + > + ret = lock_device_hotplug_sysfs(); > + if (ret) > + return ret; > + > mutex_lock(&cpuhp_state_mutex); > sp = cpuhp_get_step(target); > ret = !sp->name || sp->cant_stop ? -EINVAL : 0; > @@ -1472,6 +1477,8 @@ static ssize_t write_cpuhp_target(struct > ret = do_cpu_up(dev->id, target); > else > ret = do_cpu_down(dev->id, target); > + > + unlock_device_hotplug(); > return ret ? ret : count; > }
