linux-kernel - Re: [PATCH 2/2] rtc: jz4740: make the driver builtin only

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Message-ID: <20161219094736.pa2o3xfxos66j7b4@piout.net>
Date:   Mon, 19 Dec 2016 10:47:36 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Paul Cercueil <paul@...pouillou.net>,
        RTCLINUX <rtc-linux@...glegroups.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] rtc: jz4740: make the driver builtin only

Hi,

On 19/12/2016 at 09:03:17 +0100, Geert Uytterhoeven wrote :
> On Wed, Nov 9, 2016 at 1:37 AM, Alexandre Belloni
> <alexandre.belloni@...e-electrons.com> wrote:
> > Since the driver is now calling machine_halt() that is not exported, it has
> > to be built in the kernel. Building it as a module will fail at linking
> > time.
> >
> > Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> > ---
> >  drivers/rtc/Kconfig      |  5 +----
> >  drivers/rtc/rtc-jz4740.c | 10 +---------
> >  2 files changed, 2 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
> > index 4259ce61c31b..24b0778f6e28 100644
> > --- a/drivers/rtc/Kconfig
> > +++ b/drivers/rtc/Kconfig
> > @@ -1550,15 +1550,12 @@ config RTC_DRV_MPC5121
> >           will be called rtc-mpc5121.
> >
> >  config RTC_DRV_JZ4740
> > -       tristate "Ingenic JZ4740 SoC"
> > +       bool "Ingenic JZ4740 SoC"
> 
> Just noticed RTC_DRV_JZ4740 flipped from m to y.
> 
> This is bad for distribution kernels.
> Can't the driver just call kernel_halt() instead of machine_halt()?
> 

I'm not sure and I can't test. Paul, can you test?

Maybe the other concern is that users that are not loading the rtc
module will probably complain their machine is not powering off.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com