Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1753971AbbGJGkZ (ORCPT <rfc822;w@1wt.eu>);
	Fri, 10 Jul 2015 02:40:25 -0400
Received: from cantor2.suse.de ([195.135.220.15]:35371 "EHLO mx2.suse.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1752487AbbGJGkK (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Fri, 10 Jul 2015 02:40:10 -0400
Message-ID: <559F68C8.4050400@suse.de>
Date: Fri, 10 Jul 2015 08:40:08 +0200
From: Hannes Reinecke <hare@suse.de>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0
MIME-Version: 1.0
To: Johannes Thumshirn <jthumshirn@suse.de>,
        =?windows-1252?Q?Kai_M=E4k?= =?windows-1252?Q?isara?= 
	<Kai.Makisara@kolumbus.fi>,
        "James E.J. Bottomley" <JBottomley@odin.com>
CC: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] st: Destroy st_index_idr on module exit
References: <1436369041-31156-1-git-send-email-jthumshirn@suse.de>
In-Reply-To: <1436369041-31156-1-git-send-email-jthumshirn@suse.de>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 2093
Lines: 82

On 07/08/2015 05:24 PM, Johannes Thumshirn wrote:
> Destroy st_index_idr on module exit, reclaiming the allocated memory.
> 
> This was detected by the following semantic patch (written by Luis Rodriguez
> <mcgrof@suse.com>)
> <SmPL>
> @ defines_module_init @
> declarer name module_init, module_exit;
> declarer name DEFINE_IDR;
> identifier init;
> @@
> 
> module_init(init);
> 
> @ defines_module_exit @
> identifier exit;
> @@
> 
> module_exit(exit);
> 
> @ declares_idr depends on defines_module_init && defines_module_exit @
> identifier idr;
> @@
> 
> DEFINE_IDR(idr);
> 
> @ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
> identifier declares_idr.idr, defines_module_exit.exit;
> @@
> 
> exit(void)
> {
>  ...
>  idr_destroy(&idr);
>  ...
> }
> 
> @ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
> identifier declares_idr.idr, defines_module_exit.exit;
> @@
> 
> exit(void)
> {
>  ...
>  +idr_destroy(&idr);
> }
> </SmPL>
> 
> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
> ---
>  drivers/scsi/st.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
> index 3f25b8f..79ac024 100644
> --- a/drivers/scsi/st.c
> +++ b/drivers/scsi/st.c
> @@ -4427,6 +4427,7 @@ static void __exit exit_st(void)
>  	unregister_chrdev_region(MKDEV(SCSI_TAPE_MAJOR, 0),
>  				 ST_MAX_TAPE_ENTRIES);
>  	class_unregister(&st_sysfs_class);
> +	idr_destroy(&st_index_idr);
>  	printk(KERN_INFO "st: Unloaded.\n");
>  }
>  
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		               zSeries & Storage
hare@suse.de			               +49 911 74053 688
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 N?rnberg
GF: F. Imend?rffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton
HRB 21284 (AG N?rnberg)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/