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? Thanks, tglx 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; } -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
