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

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Date:	Fri, 25 Jul 2014 13:54:38 +0800
From:	Gu Zheng <guz.fnst@...fujitsu.com>
To:	Ming Lei <tom.leiming@...il.com>
CC:	Jeff Moyer <jmoyer@...hat.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

Hi Lei,
On 07/25/2014 11:13 AM, Ming Lei wrote:

> 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.

Sounds reasonable, but I prefer a more common name like
AIO_MAGIC to serve two if we need.:)

Thanks,
Gu

> 
> Thanks,
> .
> 


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