Re: [PATCH v7 08/11] arm/arm64: Unexport restart handlers

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On 12/04/2014 06:44 AM, Geert Uytterhoeven wrote:
Hi Günther,

On Thu, Dec 4, 2014 at 3:26 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
On 12/04/2014 05:36 AM, Geert Uytterhoeven wrote:
On Wed, Aug 20, 2014 at 2:45 AM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
Implementing a restart handler in a module don't make sense
as there would be no guarantee that the module is loaded when
a restart is needed. Unexport arm_pm_restart to ensure that
no one gets the idea to do it anyway.

Why not? I was just going to do that, but I got greeted by:

Because you should register a restart handler instead, like the other
drivers in the same directory now do.

That's a different thing. "there would be no guarantee that the module is
loaded when a restart is needed" is also valid for restart handlers...


Not really, because you are supposed to unregister the restart handler
on unload. Sure, you can instead clear arm_pm_reastart and leave the system
with no means to restart ...

Guenter

ERROR: "arm_pm_restart" [drivers/power/reset/rmobile-reset.ko] undefined!

So now we have to make sure all reset drivers for a zillion different
hardware devices are builtin, and can't be modular?

No. All those drivers need to do is to register a restart handler using
the API provided in the patch series.

Ultimately all restart handlers should do that and arm_pm_restart should
go away entirely. That was the point of the patch series.

Good. That's what I'm doing right know ;-)

Gr{oetje,eeting}s,

                         Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

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


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