linux-kernel - Re: [PATCH] usb: usb-skeleton: Add hint to find __init and _

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Date:   Sat, 23 Oct 2021 09:11:37 +0200
From:   Philipp Hortmann <philipp.g.hortmann@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        corbet@....net, linux-doc@...r.kernel.org
Subject: Re: [PATCH] usb: usb-skeleton: Add hint to find __init and __exit

On 10/23/21 8:47 AM, Greg KH wrote:
> On Sat, Oct 23, 2021 at 07:25:38AM +0200, Philipp Hortmann wrote:
>> Comment to find __init and __exit.
>>
>> Signed-off-by: Philipp Hortmann <philipp.g.hortmann@...il.com>
>> ---
>>   drivers/usb/usb-skeleton.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
>> index 2dc58766273a..80338a50dcde 100644
>> --- a/drivers/usb/usb-skeleton.c
>> +++ b/drivers/usb/usb-skeleton.c
>> @@ -641,6 +641,7 @@ static struct usb_driver skel_driver = {
>>   	.supports_autosuspend = 1,
>>   };
>>   
>> +/* __init and __exit */
>>   module_usb_driver(skel_driver);
> 
> This comment makes no sense, sorry.  __init and __exit are things that
> the linker uses, why would you need to "find" them?
> 
> thanks,
> 
> greg k-h
> 

When I want to add something to the __init function (debug comment for 
example), how to do this without knowing that it is in module_usb_driver?

thanks,

Philipp