On 2014/12/18 12:37, Jan Beulich wrote:
>>>> On 03.12.14 at 15:29, <cheg...@amazon.de> wrote:
>> --- a/xen/common/grant_table.c
>> +++ b/xen/common/grant_table.c
[...]
>> @@ -944,6 +944,7 @@ __gnttab_unmap_common(
>>      }
>>  
>>      op->rd = rd;
>> +    read_lock(&rgt->lock);
>>      act = &active_entry(rgt, op->map->ref);
>>  
>>      if ( op->frame == 0 )
> 
> The nesting of the two locks should be mentioned in the doc change.

Where do you see the nesting coming from?

Christoph



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