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Commit 729c6ba3 authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by Thomas Gleixner
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ACPI: Reevaluate C/P/T states when a cpu becomes online 



Reevaluate C/P/T states when a cpu becomes online. This avoids
the caching of the broadcast information in the clockevents layer.

Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Cc: Len Brown <len.brown@intel.com>
parent 6a669ee8

drivers/acpi/processor_core.c

+21 −0
Original line number Diff line number Diff line
@@ -724,6 +724,25 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) 
	return;

}



static int acpi_cpu_soft_notify(struct notifier_block *nfb,

		unsigned long action, void *hcpu)

{

	unsigned int cpu = (unsigned long)hcpu;

	struct acpi_processor *pr = processors[cpu];



	if (action == CPU_ONLINE && pr) {

		acpi_processor_ppc_has_changed(pr);

		acpi_processor_cst_has_changed(pr);

		acpi_processor_tstate_has_changed(pr);

	}

	return NOTIFY_OK;

}



static struct notifier_block acpi_cpu_notifier =

{

	    .notifier_call = acpi_cpu_soft_notify,

};



static int acpi_processor_add(struct acpi_device *device)

{

	struct acpi_processor *pr = NULL;
@@ -987,6 +1006,7 @@ void acpi_processor_install_hotplug_notify(void) 
			    ACPI_UINT32_MAX,

			    processor_walk_namespace_cb, &action, NULL);

#endif

	register_hotcpu_notifier(&acpi_cpu_notifier);

}



static
@@ -999,6 +1019,7 @@ void acpi_processor_uninstall_hotplug_notify(void) 
			    ACPI_UINT32_MAX,

			    processor_walk_namespace_cb, &action, NULL);

#endif

	unregister_hotcpu_notifier(&acpi_cpu_notifier);

}



/*