linux-kernel - Re: [PATCH v2 2/6] device_cgroup: introduce dev_whitelist

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Message-ID: <20120905030347.GB13310@mail.hallyn.com>
Date:	Wed, 5 Sep 2012 03:03:47 +0000
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	Aristeu Rozanski <aris@...hat.com>
Cc:	linux-kernel@...r.kernel.org, cgroups@...r.kernel.org,
	Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>,
	James Morris <jmorris@...ei.org>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v2 2/6] device_cgroup: introduce dev_whitelist_clean()

Quoting Aristeu Rozanski (aris@...hat.com):
> This function cleans all the items in a whitelist and will be used by the next
> patches.
> 
> v2:
> - no changes
> 
> Cc: Tejun Heo <tj@...nel.org>
> Cc: Li Zefan <lizefan@...wei.com>
> Cc: James Morris <jmorris@...ei.org>
> Cc: Pavel Emelyanov <xemul@...nvz.org>
> Cc: Serge Hallyn <serge.hallyn@...onical.com>

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

> Signed-off-by: Aristeu Rozanski <aris@...hat.com>
> 
> ---
>  security/device_cgroup.c |   22 +++++++++++++++++-----
>  1 file changed, 17 insertions(+), 5 deletions(-)
> 
> Index: github/security/device_cgroup.c
> ===================================================================
> --- github.orig/security/device_cgroup.c	2012-08-21 10:50:34.650810797 -0400
> +++ github/security/device_cgroup.c	2012-08-21 10:50:37.526892088 -0400
> @@ -157,6 +157,22 @@
>  	}
>  }
>  
> +/**
> + * dev_whitelist_clean - frees all entries of the whitelist
> + * @dev_cgroup: dev_cgroup with the whitelist to be cleaned
> + *
> + * called under devcgroup_mutex
> + */
> +static void dev_whitelist_clean(struct dev_cgroup *dev_cgroup)
> +{
> +	struct dev_whitelist_item *wh, *tmp;
> +
> +	list_for_each_entry_safe(wh, tmp, &dev_cgroup->whitelist, list) {
> +		list_del(&wh->list);
> +		kfree(wh);
> +	}
> +}
> +
>  /*
>   * called from kernel/cgroup.c with cgroup_lock() held.
>   */
> @@ -203,13 +219,9 @@
>  static void devcgroup_destroy(struct cgroup *cgroup)
>  {
>  	struct dev_cgroup *dev_cgroup;
> -	struct dev_whitelist_item *wh, *tmp;
>  
>  	dev_cgroup = cgroup_to_devcgroup(cgroup);
> -	list_for_each_entry_safe(wh, tmp, &dev_cgroup->whitelist, list) {
> -		list_del(&wh->list);
> -		kfree(wh);
> -	}
> +	dev_whitelist_clean(dev_cgroup);
>  	kfree(dev_cgroup);
>  }
>  
> 
> --
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