Nick Piggin wrote:

>>          shift -= RADIX_TREE_MAP_SHIFT;
>> -        slot = slot->slots[i];
>> +        slot = rcu_dereference(slot->slots[i]);
>> +        if (slot == NULL);
>> +            break;
>>      }
> 
> 
>                          ^^^^^^^^
> 
> Up there.
> 

And here's the patch.

-- 
SUSE Labs, Novell Inc.