linux-kernel - Re: [PATCH 3/4] cpuset: Fix unchecked calls to NODEMASK

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Message-ID: <4D61F876.3040401@cn.fujitsu.com>
Date:	Mon, 21 Feb 2011 13:30:30 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul Menage <menage@...gle.com>, miaox@...fujitsu.com,
	linux-mm@...ck.org
Subject: Re: [PATCH 3/4] cpuset: Fix unchecked calls to NODEMASK_ALLOC()

> +/*
> + * Calling cpuset_static_nodemask() should be paired with this function,
> + * so we insure the global nodemask won't be used by more than one user
> + * at the one time.
> + */
> +static void cpuset_release_static_nodemask(void)
> +{
> +	WARN_ON(!cgroup_lock_is_held());
> +
> +	cpuset_mems_ref--;
> +	WARN_ON(!cpuset_mems_ref);

WARN_ON(cpuset_mems_ref);

> +}
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