linux-kernel - Re: [PATCH] devcg: remove parent

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Date:	Tue, 16 Apr 2013 16:07:25 -0500
From:	Serge Hallyn <serge.hallyn@...ntu.com>
To:	Aristeu Rozanski <aris@...hat.com>
Cc:	Rami Rosen <ramirose@...il.com>, tj@...nel.org, lizefan@...wei.com,
	cgroups@...r.kernel.org, containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, serge.hallyn@...onical.com
Subject: Re: [PATCH] devcg: remove parent_cgroup.

Quoting Aristeu Rozanski (aris@...hat.com):
> On Tue, Apr 16, 2013 at 11:24:55PM +0300, Rami Rosen wrote:
> > In devcgroup_css_alloc(), there is no longer need for parent_cgroup.
> > bd2953ebbb("devcg: propagate local changes down the hierarchy") made
> > the variable parent_cgroup redundant. This patch removes parent_cgroup
> > from devcgroup_css_alloc().
> > 
> > Signed-off-by: Rami Rosen <ramirose@...il.com>
> > ---
> >  security/device_cgroup.c | 2 --
> >  1 file changed, 2 deletions(-)
> > 
> > diff --git a/security/device_cgroup.c b/security/device_cgroup.c
> > index 994aecc..dd0dc57 100644
> > --- a/security/device_cgroup.c
> > +++ b/security/device_cgroup.c
> > @@ -236,7 +236,6 @@ static void devcgroup_offline(struct cgroup *cgroup)
> >  static struct cgroup_subsys_state *devcgroup_css_alloc(struct cgroup *cgroup)
> >  {
> >  	struct dev_cgroup *dev_cgroup;
> > -	struct cgroup *parent_cgroup;
> >  
> >  	dev_cgroup = kzalloc(sizeof(*dev_cgroup), GFP_KERNEL);
> >  	if (!dev_cgroup)
> > @@ -244,7 +243,6 @@ static struct cgroup_subsys_state *devcgroup_css_alloc(struct cgroup *cgroup)
> >  	INIT_LIST_HEAD(&dev_cgroup->exceptions);
> >  	INIT_LIST_HEAD(&dev_cgroup->propagate_pending);
> >  	dev_cgroup->behavior = DEVCG_DEFAULT_NONE;
> > -	parent_cgroup = cgroup->parent;
> >  
> >  	return &dev_cgroup->css;
> >  }
> 
> oops
> 
> ACK

Not seeing the patches this is based on in Linus' tree yet, but given
the context above I don't see how it could not be right :)

Acked-by: Serge E. Hallyn <serge.hallyn@...ntu.com>

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