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

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Date:	Wed, 4 Dec 2013 09:54:16 -0500
From:	Dave Jones <davej@...hat.com>
To:	Gu Zheng <guz.fnst@...fujitsu.com>
Cc:	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>
Subject: Re: [PATCH] aio: clean up aio ring in the fail path

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 ?

	Dave

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