linux-kernel - Re: [PATCH 0/4] irda: move it to drivers/staging so we can delete it

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Message-ID: <CAMuHMdVb-oygJkkHwBOfSmNECAfF72QruJSmVTpqdUW+RNJbrg@mail.gmail.com>
Date:   Tue, 29 Aug 2017 14:11:39 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Stefano Brivio <sbrivio@...hat.com>,
        driverdevel <devel@...verdev.osuosl.org>,
        Samuel Ortiz <samuel@...tiz.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 0/4] irda: move it to drivers/staging so we can delete it

Hi Greg,

On Tue, Aug 29, 2017 at 1:28 PM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
> On Tue, Aug 29, 2017 at 01:11:31PM +0200, Stefano Brivio wrote:
>> On Tue, 29 Aug 2017 12:59:00 +0200
>> Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>> > On Sun, Aug 27, 2017 at 5:03 PM, Greg Kroah-Hartman
>> > <gregkh@...uxfoundation.org> wrote:
>> > > The IRDA code has long been obsolete and broken.  So, to keep people
>> > > from trying to use it, and to prevent people from having to maintain it,
>> > > let's move it to drivers/staging/ so that we can delete it entirely from
>> > > the kernel in a few releases.
>> >
>> > (diving into an early boot crash)
>> >
>> > Have you tried running this? ;-)
>> >
>> > irda_init() and net_dev_init() are both subsys_initcall()s.
>> > But the former now runs before the latter, leading to:
>> >
>> > Unable to handle kernel NULL pointer dereference at virtual address 00000004
>>
>> Should be fixed by https://patchwork.ozlabs.org/patch/807006/
>> ("[net-next] staging: irda: force to be a kernel module") I guess...
>
> Yup, that's the fix for this issue.
>
> Geert, does that fix the problem for you?

Thanks, that patch fixes the crash, obviously.

It does mean you can no longer have IrDA in a non-modular kernel.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds