[PATCH v4 6/9] power: reset: macsmc-reboot: Add driver for rebooting via Apple SMC

[Alyssa Rosenzweig]

> >
> >> +		mdelay(100);
> >> +		WARN_ON(1);
> >
> > ...What?
> 
> This is done in a few drivers in drivers/power/reboot. If we haven't
> rebooted after 100ms something's wrong with SMC. I'll add a comment.
> 
> drivers/power/reset/tps65086-restart.c:	WARN_ON(1);
> drivers/power/reset/atc260x-poweroff.c:	WARN_ONCE(1, "Unable to power off system\n");
> drivers/power/reset/mt6323-poweroff.c:	WARN_ONCE(1, "Unable to power off system\n");
> drivers/power/reset/gpio-restart.c:	WARN_ON(1);
> drivers/power/reset/regulator-poweroff.c:	WARN_ON(1);

Ohh, duh, ok. Cute.

Can we do the WARN_ONCE(1, "Unable ...") pattern? Then we don't need a
comment since the warn message makes it obvious.