linux-kernel - Re: [PATCH v2] kernel: audit.c: Add _

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Message-ID: <20191130020742.GF157739@google.com>
Date:   Fri, 29 Nov 2019 21:07:42 -0500
From:   Joel Fernandes <joel@...lfernandes.org>
To:     Amol Grover <frextrite@...il.com>
Cc:     Paul Moore <paul@...l-moore.com>, Eric Paris <eparis@...hat.com>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-audit@...hat.com, linux-kernel@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v2] kernel: audit.c: Add __rcu notation to RCU pointer

On Thu, Nov 28, 2019 at 09:02:03PM +0530, Amol Grover wrote:
> add __rcu notation to RCU protected global pointer auditd_conn

Again, please use proper punctuation and captilization. This is unacceptable.
Please put more effort into changelog.

Otherwise the patch diff itself looks good to me, with the above nit
corrected, you could add my tag to the next revision:

Reviewed-by: Joel Fernandes (Google) <joel@...lfernandes.org>

thanks,

 - Joel

> 
> Fixes multiple instances of sparse error:
> error: incompatible types in comparison expression
> (different address spaces)
> 
> Signed-off-by: Amol Grover <frextrite@...il.com>
> ---
> v2:
> - fix erroneous RCU pointer initialization
> 
>  kernel/audit.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/kernel/audit.c b/kernel/audit.c
> index da8dc0db5bd3..ff7cfc61f53d 100644
> --- a/kernel/audit.c
> +++ b/kernel/audit.c
> @@ -102,12 +102,13 @@ struct audit_net {
>   * This struct is RCU protected; you must either hold the RCU lock for reading
>   * or the associated spinlock for writing.
>   */
> -static struct auditd_connection {
> +struct auditd_connection {
>  	struct pid *pid;
>  	u32 portid;
>  	struct net *net;
>  	struct rcu_head rcu;
> -} *auditd_conn = NULL;
> +};
> +static struct auditd_connection __rcu *auditd_conn;
>  static DEFINE_SPINLOCK(auditd_conn_lock);
>  
>  /* If audit_rate_limit is non-zero, limit the rate of sending audit records
> -- 
> 2.24.0
>