[PATCH v2 2/7] arm64: Support restart through restart notifier call chain

[Andrew Morton]

On Sun,  6 Jul 2014 16:38:15 -0700 Guenter Roeck <linux at roeck-us.net> wrote:

> The kernel core now supports a notifier call chain to restart
> the system. Call it if arm_pm_restart is not set.
> 
> ...
>
> --- a/arch/arm64/kernel/process.c
> +++ b/arch/arm64/kernel/process.c
> @@ -174,6 +174,9 @@ void machine_restart(char *cmd)
>  	/* Now call the architecture specific reboot code. */
>  	if (arm_pm_restart)
>  		arm_pm_restart(reboot_mode, cmd);
> +	else
> +		blocking_notifier_call_chain(&restart_notifier_list,
> +					     reboot_mode, cmd);

It would be a bit neater to have a helper function to perform the call,
rather than directly accessing the notifier list.  Apart from anything
else, this hides the fact that the core code (presently!) uses the
blocking_ style notifiers.