[PATCH 4/4] UBI: Fastmap: Ensure that only one fastmap work is scheduled

[Richard Weinberger]

Am 30.09.2014 08:45, schrieb Bityutskiy, Artem:
> On Tue, 2014-09-30 at 00:20 +0200, Richard Weinberger wrote:
>> +       spin_lock(&ubi->wl_lock);
>> +       ubi->fm_work_scheduled = 0;
>> +       spin_unlock(&ubi->wl_lock);
> 
> Andrew Morton once said me that if I am protecting an integer change
> like this with a spinlock, I have a problem in my locking design. He was
> right for my particular case.
> 
> Integer is changes atomic. The only other thing spinlock adds are the
> barriers.

I've added the spinlock to have a barrier in any case.

Thanks,
//richard