linux-kernel - Re: [PATCH 7/9] usb: usbip: eliminate anonymous module_init & module

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Date:   Fri, 18 Mar 2022 16:45:54 -0600
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org
Cc:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, Amit Shah <amit@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eli Cohen <eli@...lanox.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Krzysztof Opasiak <k.opasiak@...sung.com>,
        Igor Kotrasinski <i.kotrasinsk@...sung.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Jussi Kivilinna <jussi.kivilinna@...et.fi>,
        Joachim Fritschi <jfritschi@...enet.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>,
        Karol Herbst <karolherbst@...il.com>,
        Pekka Paalanen <ppaalanen@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-usb@...r.kernel.org, nouveau@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org, x86@...nel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH 7/9] usb: usbip: eliminate anonymous module_init &
 module_exit

On 3/16/22 1:20 PM, Randy Dunlap wrote:
> Eliminate anonymous module_init() and module_exit(), which can lead to
> confusion or ambiguity when reading System.map, crashes/oops/bugs,
> or an initcall_debug log.
> 
> Give each of these init and exit functions unique driver-specific
> names to eliminate the anonymous names.
> 
> Example 1: (System.map)
>   ffffffff832fc78c t init
>   ffffffff832fc79e t init
>   ffffffff832fc8f8 t init
> 
> Example 2: (initcall_debug log)
>   calling  init+0x0/0x12 @ 1
>   initcall init+0x0/0x12 returned 0 after 15 usecs
>   calling  init+0x0/0x60 @ 1
>   initcall init+0x0/0x60 returned 0 after 2 usecs
>   calling  init+0x0/0x9a @ 1
>   initcall init+0x0/0x9a returned 0 after 74 usecs
> 
> Fixes: 80fd9cd52de6 ("usbip: vudc: Add VUDC main file")
> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
> Cc: Krzysztof Opasiak <k.opasiak@...sung.com>
> Cc: Igor Kotrasinski <i.kotrasinsk@...sung.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Valentina Manea <valentina.manea.m@...il.com>
> Cc: Shuah Khan <shuah@...nel.org>
> Cc: Shuah Khan <skhan@...uxfoundation.org>
> Cc: linux-usb@...r.kernel.org
> ---
>   drivers/usb/usbip/vudc_main.c |    8 ++++----
>   1 file changed, 4 insertions(+), 4 deletions(-)
> 
> --- lnx-517-rc8.orig/drivers/usb/usbip/vudc_main.c
> +++ lnx-517-rc8/drivers/usb/usbip/vudc_main.c
> @@ -28,7 +28,7 @@ static struct platform_driver vudc_drive
>   
>   static struct list_head vudc_devices = LIST_HEAD_INIT(vudc_devices);
>   
> -static int __init init(void)
> +static int __init vudc_init(void)
>   {
>   	int retval = -ENOMEM;
>   	int i;
> @@ -86,9 +86,9 @@ cleanup:
>   out:
>   	return retval;
>   }
> -module_init(init);
> +module_init(vudc_init);
>   
> -static void __exit cleanup(void)
> +static void __exit vudc_cleanup(void)
>   {
>   	struct vudc_device *udc_dev = NULL, *udc_dev2 = NULL;
>   
> @@ -103,7 +103,7 @@ static void __exit cleanup(void)
>   	}
>   	platform_driver_unregister(&vudc_driver);
>   }
> -module_exit(cleanup);
> +module_exit(vudc_cleanup);
>   
>   MODULE_DESCRIPTION("USB over IP Device Controller");
>   MODULE_AUTHOR("Krzysztof Opasiak, Karol Kosik, Igor Kotrasinski");
> 

Thanks for fixing this.

Acked-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah