linux-kernel - Re: [PATCH] aio: clean up aio ring in the fail path

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Date:	Thu, 05 Dec 2013 09:22:59 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Dave Jones <davej@...hat.com>, Benjamin <bcrl@...ck.org>,
	linux-aio@...ck.org, fsdevel <linux-fsdevel@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>, Kent <kmo@...erainc.com>,
	Kristian Nielsen <knielsen@...elsen-hq.org>,
	guz.fnst@...fujitsu.com
Subject: Re: [PATCH] aio: clean up aio ring in the fail path

On 12/05/2013 09:14 AM, Gu Zheng wrote:

> Hi Dave,
> 
> On 12/04/2013 10:54 PM, Dave Jones wrote:
> 
>> On Wed, Dec 04, 2013 at 06:19:06PM +0800, Gu Zheng wrote:
>>  > Clean up the aio ring file in the fail path of aio_setup_ring
>>  > and ioctx_alloc. And maybe it can fix the GPF issue reported by
>>  > Dave Jones:
>>  > https://lkml.org/lkml/2013/11/25/898
>>  > 
>>  > 
>>  > Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
>>  > ---
>>  >  fs/aio.c |    8 ++++++--
>>  >  1 files changed, 6 insertions(+), 2 deletions(-)
>>  > 
>>  > diff --git a/fs/aio.c b/fs/aio.c
>>  > index 08159ed..6efb7f6 100644
>>  > --- a/fs/aio.c
>>  > +++ b/fs/aio.c
>>  > @@ -367,8 +367,10 @@ static int aio_setup_ring(struct kioctx *ctx)
>>  >  	if (nr_pages > AIO_RING_PAGES) {
>>  >  		ctx->ring_pages = kcalloc(nr_pages, sizeof(struct page *),
>>  >  					  GFP_KERNEL);
>>  > -		if (!ctx->ring_pages)
>>  > +		if (!ctx->ring_pages) {
>>  > +			put_aio_ring_file(ctx);
>>  >  			return -ENOMEM;
>>  > +		}
>>  >  	}
>>  >  
>>
>>   CC      fs/aio.o
>> fs/aio.c: In function ‘aio_setup_ring’:
>> fs/aio.c:363:4: error: implicit declaration of function ‘put_aio_ring_file’ [-Werror=implicit-function-declaration]
>>     put_aio_ring_file(ctx);
>>
>>
>> Is this dependant on another patch ?
> 
> It's applied on 3.12-rc2. Please ignore the previous defective patch I sent

Sorry, s/3.12-rc2/3.13-rc2/

> before, and try again.
> 
> Regards,
> Gu
> 
>>
>> 	Dave
>>
>> --
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> 
> 


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