linux-kernel - Re: [PATCH net-next] staging: irda: force to be a kernel module

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Message-Id: <20170829.104002.1846880154337344552.davem@davemloft.net>
Date:   Tue, 29 Aug 2017 10:40:02 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     gregkh@...uxfoundation.org
Cc:     samuel@...tiz.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Subject: Re: [PATCH net-next] staging: irda: force to be a kernel module

From: Greg KH <gregkh@...uxfoundation.org>
Date: Tue, 29 Aug 2017 19:26:08 +0200

> On Tue, Aug 29, 2017 at 09:35:07AM -0700, David Miller wrote:
>> From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Date: Tue, 29 Aug 2017 11:14:17 +0200
>> 
>> > Now that the IRDA networking code has moved into drivers/staging/, the
>> > link order is changed for when it is initialized if built into the
>> > system.  This can cause a crash when initializing as the netfilter core
>> > hasn't been initialized yet.
>> > 
>> > So force the IRDA code to be built as a module, preventing the crash.
>> > 
>> > Reported-by: kernel test robot <fengguang.wu@...el.com>
>> > Signed-off-by: Greg Kroah-Hartman gregkh@...uxfoundation.org
>> 
>> I don't think this is reasonable.
>> 
>> IRDA being built in was broken by moving it to staging, so it's a
>> regression and we should find a way to fix it.
> 
> Hm, this is due to netlink coming before irda in the link order before
> this patch series.  I can't change the link order to put all of net/
> before drivers/, which would solve this, and I don't think I can put:
> 	obj-$(CONFIG_IRDA) += ../../drivers/staging/irda/net/
> in a networking Makefile, can I?  Does "../" even work in a Makefile
> like that?
> 
> Any other thoughts?

Change the initialization type in IRDA from subsys_init() to ...
something else?

Amazing!