Subject: [update][PATCH v10 06/21] ACPI / sleep: Introduce CONFIG_ACPI_GENERIC_SLEEP

From: [email-masked] (Hanjun Guo)
Date: Tue, 17 Mar 2015 09:08:45 +0800

On 2015/3/17 7:15, Rafael J. Wysocki wrote:
> On Monday, March 16, 2015 08:14:52 PM Hanjun Guo wrote:
>> On 2015?03?14? 05:49, Rafael J. Wysocki wrote:
>>> On Friday, March 13, 2015 04:14:29 PM Hanjun Guo wrote:
[...]
>>>>
>>>> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
>>>> index 074e52b..e8728d7 100644
>>>> --- a/arch/ia64/Kconfig
>>>> +++ b/arch/ia64/Kconfig
>>>> @@ -10,6 +10,7 @@ config IA64
>>>>   	select ARCH_MIGHT_HAVE_PC_SERIO
>>>>   	select PCI if (!IA64_HP_SIM)
>>>>   	select ACPI if (!IA64_HP_SIM)
>>>> +	select ACPI_GENERIC_SLEEP if ACPI
>>>>   	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
>>>>   	select HAVE_UNSTABLE_SCHED_CLOCK
>>>>   	select HAVE_IDE
>>>> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>>>> index b7d31ca..9804431 100644
>>>> --- a/arch/x86/Kconfig
>>>> +++ b/arch/x86/Kconfig
>>>> @@ -22,6 +22,7 @@ config X86_64
>>>>   ### Arch settings
>>>>   config X86
>>>>   	def_bool y
>>>> +	select ACPI_GENERIC_SLEEP if ACPI
>>> One more nit.  If you did
>>>
>>> +	select ACPI_GENERIC_SLEEP if ACPI_SLEEP
>>>
>>> here (and above for ia64), you'd avoid having to make ACPI_SLEEP
>>> depend on ACPI_GENERIC_SLEEP which goes somewhat backwards.
>> In sleep.c,
>>
>> #ifdef CONFIG_ACPI_SLEEP
>> acpi_target_system_state()
>> {
>> }
>> #endif
>>
>> and CONFIG_ACPI_SLEEP depends on SUSPEND || HIBERNATION,
>> which one of them will be enabled on ARM64 so ACPI_SLEEP
>> will also enabled too.
>>
>> So if we
>>
>> +select ACPI_GENERIC_SLEEP if ACPI_SLEEP
>>
>> and
>>
>> +acpi-$(CONFIG_ACPI_GENERIC_SLEEP) += sleep.o
>>
>> it will lead to errors for acpi_target_system_state() that
>> is declared but not defined, so I will keep the code as
>> it is, what do you think?
> No, we need to hash this out.  Having two different Kconfig options meaning
> almost the same thing (ACPI_SLEEP and ACPI_GENERIC_SLEEP) is beyond ugly.
>
> Do you need ACPI_SLEEP on ARM64 at all?

No, at least for now we don't need it, the spec for sleep is not ready for
ARM64 arch, so ACPI_SLEEP will not work at all on ARM64.

Thanks
Hanjun