linux-kernel - Re: [PATCH 2/4] aio: use the macro rather than the inline magic number

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Message-ID: <CACVXFVOv1TShu=s40KvVLMTfk4b2ktZ0xmDUPyiO+7=BqOcSrw@mail.gmail.com>
Date:	Fri, 25 Jul 2014 11:13:16 +0800
From:	Ming Lei <tom.leiming@...il.com>
To:	Jeff Moyer <jmoyer@...hat.com>
Cc:	Gu Zheng <guz.fnst@...fujitsu.com>,
	Benjamin LaHaise <bcrl@...ck.org>,
	Jens Axboe <axboe@...nel.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"open list:AIO" <linux-aio@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] aio: use the macro rather than the inline magic number

On Tue, Jul 22, 2014 at 9:54 PM, Jeff Moyer <jmoyer@...hat.com> wrote:
> Gu Zheng <guz.fnst@...fujitsu.com> writes:
>
>> Signed-off-by: Gu Zheng <guz.fnst@...fujitsu.com>
>
> Reviewed-by: Jeff Moyer <jmoyer@...hat.com>
>
>> ---
>>  fs/aio.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/fs/aio.c b/fs/aio.c
>> index ad35876..1dc6158 100644
>> --- a/fs/aio.c
>> +++ b/fs/aio.c
>> @@ -201,7 +201,7 @@ static struct dentry *aio_mount(struct file_system_type *fs_type,
>>       static const struct dentry_operations ops = {
>>               .d_dname        = simple_dname,
>>       };
>> -     return mount_pseudo(fs_type, "aio:", NULL, &ops, 0xa10a10a1);
>> +     return mount_pseudo(fs_type, "aio:", NULL, &ops, AIO_RING_MAGIC);

IMO, it might be better to use a new macro like AIO_FS_MAGIC
with same number here because the same magic number
0xa10a10a1 serves for two purposes.

Thanks,
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