Re: [PATCH v2 1/7] kernel/resource: make release_mem_region_adjustable() never fail

[Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>]

On Tue, Sep 15, 2020 at 11:15:53AM +0200, David Hildenbrand wrote:
>On 15.09.20 11:06, Wei Yang wrote:
>> On Tue, Sep 15, 2020 at 09:35:30AM +0200, David Hildenbrand wrote:
>>>
>>>>> static int __ref try_remove_memory(int nid, u64 start, u64 size)
>>>>> {
>>>>>   int rc = 0;
>>>>> @@ -1777,7 +1757,7 @@ static int __ref try_remove_memory(int nid, u64 
>>>>> start, u64 size)
>>>>>           memblock_remove(start, size);
>>>>>   }
>>>>>
>>>>> - __release_memory_resource(start, size);
>>>>> + release_mem_region_adjustable(&iomem_resource, start, size);
>>>>>
>>>>
>>>> Seems the only user of release_mem_region_adjustable() is here, can we move
>>>> iomem_resource into the function body? Actually, we don't iterate the 
>>>> resource
>>>> tree from any level. We always start from the root.
>>>
>>> You mean, making iomem_resource implicit? I can spot that something
>>> similar was done for
>>>
>>> #define devm_release_mem_region(dev, start, n) \
>>>     __devm_release_region(dev, &iomem_resource, (start), (n))
>>>
>> 
>> What I prefer is remove iomem_resource from the parameter list. Just use is 
>> in
>> the function body.
>> 
>> For the example you listed, __release_region() would have varies of *parent*,
>> which looks reasonable to keep it here.
>
>Yeah I got that ("making iomem_resource implicit"), as I said:
>

Thanks

>>> I'll send an addon patch for that, ok? - thanks.
>
>-- 
>Thanks,
>
>David / dhildenb

-- 
Wei Yang
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