linux-kernel - Re: [PATCH v3 2/3] fs: direct-io: call .bi_end_io via bio

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Date:	Tue, 3 May 2016 09:26:45 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Jens Axboe <axboe@...com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-block@...r.kernel.org,
	Btrfs BTRFS <linux-btrfs@...r.kernel.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	"open list:FILESYSTEMS (VFS and infrastructure)" 
	<linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v3 2/3] fs: direct-io: call .bi_end_io via bio_endio()

On Mon, May 2, 2016 at 10:50 PM, Christoph Hellwig <hch@...radead.org> wrote:
> On Thu, Apr 28, 2016 at 09:09:48AM +0800, Ming Lei wrote:
>> bio_endio() is the graceful way to complete one bio.
>
>
>
>>
>> Signed-off-by: Ming Lei <ming.lei@...onical.com>
>> ---
>>  fs/direct-io.c | 7 +------
>>  1 file changed, 1 insertion(+), 6 deletions(-)
>>
>> diff --git a/fs/direct-io.c b/fs/direct-io.c
>> index a8dd60a..0a35e51 100644
>> --- a/fs/direct-io.c
>> +++ b/fs/direct-io.c
>> @@ -350,15 +350,10 @@ static void dio_bio_end_io(struct bio *bio)
>>   */
>>  void dio_end_io(struct bio *bio, int error)
>>  {
>> -     struct dio *dio = bio->bi_private;
>> -
>>       if (!bio->bi_error)
>>               bio->bi_error = error;
>>
>> -     if (dio->is_async)
>> -             dio_bio_end_aio(bio);
>> -     else
>> -             dio_bio_end_io(bio);
>> +     bio_endio(bio);
>>  }
>>  EXPORT_SYMBOL_GPL(dio_end_io);
>
> dio_end_io is only used by btrfs.  So instead of this and the previous
> patch you should just open code the error assignment and call to
> bio_endio in btrfs.

OK.

Thanks,