linux-kernel - Re: [PATCH 5/8 v2] dm: replace memset by memzero

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Message-ID: <20141201230037.GA9761@redhat.com>
Date:	Mon, 1 Dec 2014 18:00:38 -0500
From:	Mike Snitzer <snitzer@...hat.com>
To:	Milan Broz <gmazyland@...il.com>
Cc:	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, Julia Lawall <Julia.Lawall@...6.fr>,
	dm-devel@...hat.com, Alasdair Kergon <agk@...hat.com>
Subject: Re: [PATCH 5/8 v2] dm: replace memset by memzero_explicit

On Mon, Dec 01 2014 at  4:03pm -0500,
Milan Broz <gmazyland@...il.com> wrote:

> On 11/30/2014 06:03 PM, Julia Lawall wrote:
> > From: Julia Lawall <Julia.Lawall@...6.fr>
> > 
> > Memset on a local variable may be removed when it is called just before the
> > variable goes out of scope.  Using memzero_explicit defeats this
> > optimization.  A simplified version of the semantic patch that makes this
> > change is as follows: (http://coccinelle.lip6.fr/)
> 
> Ack, but I submitted the same patch a week ago....
> 
> https://www.redhat.com/archives/dm-devel/2014-November/msg00084.html
> 
> Mike, please could you add this to linux-next tree or you want this
> to go through Herbert's tree?
> (I do not think it is good idea for DM patches.)

I staged it in linux-next for 3.19 inclusion, see:
https://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=dm-for-3.19&id=a722201f9075b28be140bc13f8ec07bf6a42edd4
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