On Wed, 31 May 2017 08:14:54 +0200 Oleksij Rempel <o.rem...@pengutronix.de> 
wrote:

> we need it to preconfigure PMIC to properly power off the system.

Who is "we", what is a "PMIC", what architecture is affected and where
is this code which references pm_power_off_prepare?

> --- a/kernel/reboot.c
> +++ b/kernel/reboot.c
> @@ -49,6 +49,7 @@ int reboot_force;
>   */
>  
>  void (*pm_power_off_prepare)(void);
> +EXPORT_SYMBOL(pm_power_off_prepare);
>  
>  /**
>   *   emergency_restart - reboot the system
> -- 
> 2.11.0

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