linux-kernel - Re: [PATCH 2/2] proc read mm's {arg,env}_{start,end} with mmap semaphore taken.

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Message-ID: <CAKeScWjvz7Bja6wMw5euWNWYdZ5_ikEdgR1Qk77pcCFajHmbeQ@mail.gmail.com>
Date:	Wed, 6 Jan 2016 15:14:22 +0530
From:	Anshuman Khandual <anshuman.linux@...il.com>
To:	Mateusz Guzik <mguzik@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Alexey Dobriyan <adobriyan@...il.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Jarod Wilson <jarod@...hat.com>,
	Jan Stancek <jstancek@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 2/2] proc read mm's {arg,env}_{start,end} with mmap
 semaphore taken.

On Wed, Jan 6, 2016 at 10:32 AM, Mateusz Guzik <mguzik@...hat.com> wrote:
> Only functions doing more than one read are modified. Consumeres
> happened to deal with possibly changing data, but it does not seem
> like a good thing to rely on.

There are no other functions which might be reading mm-> members without
having a lock ? Why just deal with functions with more than one read ?
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