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SubjectRe: [Update][PATCH 5/5] PM: Drop generic_subsys_pm_ops
Date
On Thursday, December 15, 2011, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@sisk.pl>
>
> Since the PM core is now going to execute driver callbacks directly
> if the corresponding subsystem callbacks are not present,
> forward-only subsystem callbacks (i.e. such that only execute the
> corresponding driver callbacks) are not necessary any more. Thus
> it is possible to remove generic_subsys_pm_ops, because the only
> callback in there that is not forward-only, .runtime_idle, is not
> really used by the only user of generic_subsys_pm_ops, which is
> vio_bus_type.
>
> However, the generic callback routines themselves cannot be removed
> from generic_ops.c, because they are used individually by a number
> of subsystems.
>
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

Well, Ben should have a look at this one too. Now CCed.

Thanks,
Rafael


> ---
> arch/powerpc/kernel/vio.c | 1 -
> drivers/base/power/generic_ops.c | 25 -------------------------
> include/linux/pm.h | 13 -------------
> 3 files changed, 39 deletions(-)
>
> Index: linux/drivers/base/power/generic_ops.c
> ===================================================================
> --- linux.orig/drivers/base/power/generic_ops.c
> +++ linux/drivers/base/power/generic_ops.c
> @@ -302,28 +302,3 @@ void pm_generic_complete(struct device *
> pm_runtime_idle(dev);
> }
> #endif /* CONFIG_PM_SLEEP */
> -
> -struct dev_pm_ops generic_subsys_pm_ops = {
> -#ifdef CONFIG_PM_SLEEP
> - .prepare = pm_generic_prepare,
> - .suspend = pm_generic_suspend,
> - .suspend_noirq = pm_generic_suspend_noirq,
> - .resume = pm_generic_resume,
> - .resume_noirq = pm_generic_resume_noirq,
> - .freeze = pm_generic_freeze,
> - .freeze_noirq = pm_generic_freeze_noirq,
> - .thaw = pm_generic_thaw,
> - .thaw_noirq = pm_generic_thaw_noirq,
> - .poweroff = pm_generic_poweroff,
> - .poweroff_noirq = pm_generic_poweroff_noirq,
> - .restore = pm_generic_restore,
> - .restore_noirq = pm_generic_restore_noirq,
> - .complete = pm_generic_complete,
> -#endif
> -#ifdef CONFIG_PM_RUNTIME
> - .runtime_suspend = pm_generic_runtime_suspend,
> - .runtime_resume = pm_generic_runtime_resume,
> - .runtime_idle = pm_generic_runtime_idle,
> -#endif
> -};
> -EXPORT_SYMBOL_GPL(generic_subsys_pm_ops);
> Index: linux/include/linux/pm.h
> ===================================================================
> --- linux.orig/include/linux/pm.h
> +++ linux/include/linux/pm.h
> @@ -300,19 +300,6 @@ const struct dev_pm_ops name = { \
> SET_RUNTIME_PM_OPS(suspend_fn, resume_fn, idle_fn) \
> }
>
> -/*
> - * Use this for subsystems (bus types, device types, device classes) that don't
> - * need any special suspend/resume handling in addition to invoking the PM
> - * callbacks provided by device drivers supporting both the system sleep PM and
> - * runtime PM, make the pm member point to generic_subsys_pm_ops.
> - */
> -#ifdef CONFIG_PM
> -extern struct dev_pm_ops generic_subsys_pm_ops;
> -#define GENERIC_SUBSYS_PM_OPS (&generic_subsys_pm_ops)
> -#else
> -#define GENERIC_SUBSYS_PM_OPS NULL
> -#endif
> -
> /**
> * PM_EVENT_ messages
> *
> Index: linux/arch/powerpc/kernel/vio.c
> ===================================================================
> --- linux.orig/arch/powerpc/kernel/vio.c
> +++ linux/arch/powerpc/kernel/vio.c
> @@ -1406,7 +1406,6 @@ static struct bus_type vio_bus_type = {
> .match = vio_bus_match,
> .probe = vio_bus_probe,
> .remove = vio_bus_remove,
> - .pm = GENERIC_SUBSYS_PM_OPS,
> };
>
> /**
>
> --
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