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SubjectRe: [PATCH v2 01/47] kernel: Add support for poweroff handler call chain
On Mon, Oct 20, 2014 at 09:12:17PM -0700, Guenter Roeck wrote:

> v2:
> - poweroff -> power_off

Do you want to stick to power[-_ ]off consistently throughout?

> - Add defines for default priorities
> - Use raw notifiers protected by spinlocks instead of atomic notifiers
> - Add register_poweroff_handler_simple
> - Add devm_register_power_off_handler
>
> include/linux/pm.h | 22 ++++
> kernel/power/Makefile | 1 +
> kernel/power/poweroff_handler.c | 252 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 275 insertions(+)
> create mode 100644 kernel/power/poweroff_handler.c
>
> diff --git a/include/linux/pm.h b/include/linux/pm.h
> index 383fd68..7e0cb36 100644
> --- a/include/linux/pm.h
> +++ b/include/linux/pm.h
> @@ -34,7 +34,29 @@
> extern void (*pm_power_off)(void);
> extern void (*pm_power_off_prepare)(void);
>
> +/*
> + * Callbacks to manage poweroff handlers

power-off

> + */
> +
> +struct notifier_block;
> struct device; /* we have a circular dep with device.h */
> +
> +int register_power_off_handler(struct notifier_block *);
> +int devm_register_power_off_handler(struct device *, struct notifier_block *);
> +int register_power_off_handler_simple(void (*function)(void), int priority);
> +int unregister_power_off_handler(struct notifier_block *);
> +void do_kernel_power_off(void);
> +bool have_kernel_power_off(void);
> +
> +/*
> + * Pre-defined poweroff handler priorities

power-off

> + */
> +#define POWEROFF_PRIORITY_FALLBACK 0
> +#define POWEROFF_PRIORITY_LOW 64
> +#define POWEROFF_PRIORITY_DEFAULT 128
> +#define POWEROFF_PRIORITY_HIGH 192
> +#define POWEROFF_PRIORITY_HIGHEST 255

I think at least these ones should match the interface function and have
a POWER_OFF_PRIORITY_ prefix.

> +
> #ifdef CONFIG_VT_CONSOLE_SLEEP
> extern void pm_vt_switch_required(struct device *dev, bool required);
> extern void pm_vt_switch_unregister(struct device *dev);
> diff --git a/kernel/power/Makefile b/kernel/power/Makefile
> index 29472bf..4d9f0c7 100644
> --- a/kernel/power/Makefile
> +++ b/kernel/power/Makefile
> @@ -2,6 +2,7 @@
> ccflags-$(CONFIG_PM_DEBUG) := -DDEBUG
>
> obj-y += qos.o
> +obj-y += poweroff_handler.o
> obj-$(CONFIG_PM) += main.o
> obj-$(CONFIG_VT_CONSOLE_SLEEP) += console.o
> obj-$(CONFIG_FREEZER) += process.o
> diff --git a/kernel/power/poweroff_handler.c b/kernel/power/poweroff_handler.c
> new file mode 100644
> index 0000000..aeb4736
> --- /dev/null
> +++ b/kernel/power/poweroff_handler.c

power_off_handler.c?

> @@ -0,0 +1,252 @@
> +/*
> + * linux/kernel/power/poweroff_handler.c - Poweroff handling functions
> + *
> + * Copyright (c) 2014 Guenter Roeck
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public Licence
> + * as published by the Free Software Foundation; either version
> + * 2 of the Licence, or (at your option) any later version.
> + */
> +
> +#define pr_fmt(fmt) "poweroff: " fmt

power-off:?

There's a bunch of these introduced by the driver patches as well (e.g.
poweroff_nb).

Johan


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