linux-kernel - Re: [Patch v2] mm: remove dead code totalram_pages

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Message-ID: <20191219025645.GA5741@richard>
Date:   Thu, 19 Dec 2019 10:56:45 +0800
From:   Wei Yang <richardw.yang@...ux.intel.com>
To:     David Hildenbrand <david@...hat.com>
Cc:     Wei Yang <richardw.yang@...ux.intel.com>,
        akpm@...ux-foundation.org, cai@....pw, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Patch v2] mm: remove dead code totalram_pages_set()

On Wed, Dec 18, 2019 at 09:46:58AM +0100, David Hildenbrand wrote:
>On 18.12.19 01:55, Wei Yang wrote:
>> No one uses totalram_pages_set(), just remove it.
>> 
>> Fixes: ca79b0c211af ("mm: convert totalram_pages and totalhigh_pages
>> variables to atomic")
>
>Hi Wei, thanks for the update.
>
>We should really avoid "Fixes" tags here. This is neither a bugfix nor a
>compile fix.
>

Agree, when I pick up this tags, I am a little not sure whether this is
correct.

>@Andrew, can you fix that up to:
>"Last user was removed in commit ca79b0c211af ("mm: convert
>totalram_pages and totalhigh_pages variables to atomic")."
>

Hmm... this one is not that exact. This function is introduced in commit
ca79b0c211af and no one use it on its birth.

Maybe we need to change it to:

    totalram_pages_set() is introduced in commit ca79b0c211af ("mm: convert
    totalram_pages and totalhigh_pages variables to atomic"), but no one
    use it.

Thanks for your comments:-)

>Cheers!
>
>> 
>> Signed-off-by: Wei Yang <richardw.yang@...ux.intel.com>
>> Reviewed-by: David Hildenbrand <david@...hat.com>
>> 
>> ---
>> v2: fix typo and points which commit introduce it.
>> ---
>>  include/linux/mm.h | 5 -----
>>  1 file changed, 5 deletions(-)
>> 
>> diff --git a/include/linux/mm.h b/include/linux/mm.h
>> index 74232b28949b..4cf023c4c6b3 100644
>> --- a/include/linux/mm.h
>> +++ b/include/linux/mm.h
>> @@ -70,11 +70,6 @@ static inline void totalram_pages_add(long count)
>>  	atomic_long_add(count, &_totalram_pages);
>>  }
>>  
>> -static inline void totalram_pages_set(long val)
>> -{
>> -	atomic_long_set(&_totalram_pages, val);
>> -}
>> -
>>  extern void * high_memory;
>>  extern int page_cluster;
>>  
>> 
>
>
>-- 
>Thanks,
>
>David / dhildenb

-- 
Wei Yang
Help you, Help me