linux-kernel - Re: [PATCH 2/3] mm/shmem.c: let shmem_show

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Date:	Thu, 22 Aug 2013 08:52:11 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Mel Gorman <mgorman@...e.de>, kosaki.motohiro@...fujitsu.com,
	riel@...hat.com, hughd@...gle.com, xemul@...allels.com,
	rientjes@...gle.com, Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Cyrill Gorcunov <gorcunov@...il.com>, linux-mm@...ck.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] mm/shmem.c: let shmem_show_mpol() return value.

On 08/22/2013 06:03 AM, Andrew Morton wrote:
> On Wed, 21 Aug 2013 10:23:58 +0800 Chen Gang <gang.chen@...anux.com> wrote:
> 
>> Let shmem_show_mpol() return value, since it may fail.
>>
> 
> This patch has no effect.
> 
>> --- a/mm/shmem.c
>> +++ b/mm/shmem.c
>> @@ -883,16 +883,17 @@ redirty:
>>  
>>  #ifdef CONFIG_NUMA
>>  #ifdef CONFIG_TMPFS
>> -static void shmem_show_mpol(struct seq_file *seq, struct mempolicy *mpol)
>> +static int shmem_show_mpol(struct seq_file *seq, struct mempolicy *mpol)
>>  {
>>  	char buffer[64];
>>  
>>  	if (!mpol || mpol->mode == MPOL_DEFAULT)
>> -		return;		/* show nothing */
>> +		return 0;		/* show nothing */
>>  
>>  	mpol_to_str(buffer, sizeof(buffer), mpol);
> 
> Perhaps you meant to check the mpol_to_str() return value here.
> 

Yes, I will merge them together (merge Patch 2/3 and Patch 3/3).

>>  	seq_printf(seq, ",mpol=%s", buffer);
>> +	return 0;
>>  }
>>  
>>  static struct mempolicy *shmem_get_sbmpol(struct shmem_sb_info *sbinfo)
> 
> 
> 

Thanks.
-- 
Chen Gang
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