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Subject: Re: [PATCH v3] apparmor: Use a memory pool instead per-CPU caches
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     John Johansen <john.johansen@canonical.com>,
        linux-security-module@vger.kernel.org,
        James Morris <jmorris@namei.org>,
        "Serge E. Hallyn" <serge@hallyn.com>, tglx@linutronix.de
References: <20190405133458.4809-1-bigeasy@linutronix.de>
 <ae17e2a3-7d08-5863-4fba-66ddeac11541@canonical.com>
 <20190430144725.gd6r3aketxuqdyir@linutronix.de>
 <02d7772b-5d06-1c32-b089-454547fbe08b@canonical.com>
 <20190502105158.2hluemukrdz5hbus@linutronix.de>
 <7b41609f-2592-93c1-55f7-6026ff6dba26@I-love.SAKURA.ne.jp>
 <20190502134730.d3ya46ave6a7bvom@linutronix.de>
 <001f651f-c544-c3fa-c0c2-f2a2b1ed565a@i-love.sakura.ne.jp>
 <20190503114827.yky7r2cjq7zy4dfm@linutronix.de>
 <20190503115145.anv7z4kk7okydthm@linutronix.de>
From:   Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Message-ID: <56de7347-b119-155d-675c-23a227ffd516@i-love.sakura.ne.jp>
Date:   Fri, 3 May 2019 21:41:45 +0900
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On 2019/05/03 20:51, Sebastian Andrzej Siewior wrote:
> +void aa_put_buffer(char *buf)
> +{
> +	union aa_buffer *aa_buf;
> +

buf == NULL if aa_put_buffer() was called due to aa_get_buffer() == NULL.

> +	aa_buf = container_of(buf, union aa_buffer, buffer[0]);
> +
> +	spin_lock(&aa_buffers_lock);
> +	list_add(&aa_buf->list, &aa_global_buffers);
> +	spin_unlock(&aa_buffers_lock);
> +}
> +
>  /*
>   * AppArmor init functions
>   */