From: Chen Gang <chengang@emindsoft.com.cn>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
vbabka@suse.cz, kirill.shutemov@linux.intel.com,
mingo@kernel.org, dave.hansen@linux.intel.com,
dan.j.williams@intel.com, hannes@cmpxchg.org, jack@suse.cz,
iamjoonsoo.kim@lge.com, jmarchan@redhat.com,
dingel@linux.vnet.ibm.com, oleg@redhat.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org,
Chen Gang <gang.chen.5i5j@gmail.com>
Subject: Re: [PATCH] mm: gup: Re-define follow_page_mask output parameter page_mask usage
Date: Sun, 17 Jul 2016 08:13:13 +0800 [thread overview]
Message-ID: <578ACD99.2070807@emindsoft.com.cn> (raw)
In-Reply-To: <20160713075024.GB28723@dhcp22.suse.cz>
On 7/13/16 15:50, Michal Hocko wrote:
> On Wed 13-07-16 01:03:10, Chen Gang wrote:
>> On 7/12/16 05:17, Andrew Morton wrote:
>>> On Sun, 10 Jul 2016 01:17:05 +0800 chengang@emindsoft.com.cn wrote:
>>>
>>>> For a pure output parameter:
>>>>
>>>> - When callee fails, the caller should not assume the output parameter
>>>> is still valid.
>>>>
>>>> - And callee should not assume the pure output parameter must be
>>>> provided by caller -- caller has right to pass NULL when caller does
>>>> not care about it.
>>>
>>> Sorry, I don't think this one is worth merging really.
>>>
>>
>> OK, thanks, I can understand.
>>
>> It will be better if provide more details: e.g.
>>
>> - This patch is incorrect, or the comments is not correct.
>>
>> - The patch is worthless, at present.
>
> I would say the patch is not really needed. The code you are touching
> works just fine and there is no reason to touch it unless this is a part
> of a larger change where future changes would be easier to
> review/implement.
>
OK, thanks. I shall try to find other kinds of patches in linux/include,
next. :-)
--
Chen Gang (e??a??)
Managing Natural Environments is the Duty of Human Beings.
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prev parent reply other threads:[~2016-07-17 0:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-09 17:17 chengang
2016-07-11 21:17 ` Andrew Morton
2016-07-12 17:03 ` Chen Gang
2016-07-13 7:50 ` Michal Hocko
2016-07-17 0:13 ` Chen Gang [this message]
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