netdev - Re: [PATCH net-next] tun: add __exit annotations to module exit func tun

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Date: Mon, 14 Aug 2023 15:32:32 +0300
From: Leon Romanovsky <leon@...nel.org>
To: "Ziyang Xuan (William)" <william.xuanziyang@...wei.com>
Cc: willemdebruijn.kernel@...il.com, jasowang@...hat.com,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] tun: add __exit annotations to module exit func
 tun_cleanup()

On Mon, Aug 14, 2023 at 08:23:37PM +0800, Ziyang Xuan (William) wrote:
> > On Mon, Aug 14, 2023 at 07:27:59PM +0800, Ziyang Xuan (William) wrote:
> >>> On Mon, Aug 14, 2023 at 04:30:00PM +0800, Ziyang Xuan wrote:
> >>>> Add missing __exit annotations to module exit func tun_cleanup().
> >>>>
> >>>> Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>
> >>>> ---
> >>>>  drivers/net/tun.c | 2 +-
> >>>>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>>>
> >>>> diff --git a/drivers/net/tun.c b/drivers/net/tun.c
> >>>> index 973b2fc74de3..291c118579a9 100644
> >>>> --- a/drivers/net/tun.c
> >>>> +++ b/drivers/net/tun.c
> >>>> @@ -3740,7 +3740,7 @@ static int __init tun_init(void)
> >>>>  	return ret;
> >>>>  }
> >>>>  
> >>>> -static void tun_cleanup(void)
> >>>> +static void __exit tun_cleanup(void)
> >>>
> >>> Why __exit and not __net_exit?
> >>
> >> tun_cleanup() is a module exit function. it corresponds to tun_init().
> >> tun_init() uses __init, so tun_cleanup() uses __exit.
> > 
> > __net_init is equal to __init.
> 
> That is not. They are equal when CONFIG_NET_NS is not enabled.
> Refer to the definition of __net_init and __net_eixt in include/net/net_namespace.h.

Right, thanks
Reviewed-by: Leon Romanovsky <leonro@...dia.com>